748638001 has 4 divisors (see below), whose sum is σ = 748706404. Its totient is φ = 748569600.

The previous prime is 748637999. The next prime is 748638047. The reversal of 748638001 is 100836847.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100836847 = 1481 ⋅68087.

It can be written as a sum of positive squares in 2 ways, for example, as 632019600 + 116618401 = 25140^2 + 10799^2 .

It is a 3-Lehmer number, since φ(748638001) divides (748638001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 748638001 - 2¹ = 748637999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (748638071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13680 + ... + 41041.

It is an arithmetic number, because the mean of its divisors is an integer number (187176601).

It is a Poulet number, since it divides 2^748638000-1.

Almost surely, 2^748638001 is an apocalyptic number.

748638001 is the 13681-st decagonal number.

It is an amenable number.

748638001 is a deficient number, since it is larger than the sum of its proper divisors (68403).

748638001 is a wasteful number, since it uses less digits than its factorization.

748638001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68402.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 748638001 is about 27361.2499897209. The cubic root of 748638001 is about 908.0099817290.

The spelling of 748638001 in words is "seven hundred forty-eight million, six hundred thirty-eight thousand, one".