748906591 has 4 divisors (see below), whose sum is σ = 749583000. Its totient is φ = 748230184.

The previous prime is 748906573. The next prime is 748906621. The reversal of 748906591 is 195609847.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 748906591 - 2⁹ = 748906079 is a prime.

It is a super-2 number, since 2×748906591² = 1121722164086482562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748906891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336541 + ... + 338758.

It is an arithmetic number, because the mean of its divisors is an integer number (187395750).

Almost surely, 2^748906591 is an apocalyptic number.

748906591 is a deficient number, since it is larger than the sum of its proper divisors (676409).

748906591 is a wasteful number, since it uses less digits than its factorization.

748906591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676408.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 748906591 is about 27366.1577683094. The cubic root of 748906591 is about 908.1185581217.

The spelling of 748906591 in words is "seven hundred forty-eight million, nine hundred six thousand, five hundred ninety-one".