751688401 has 4 divisors (see below), whose sum is σ = 751809204. Its totient is φ = 751567600.

The previous prime is 751688387. The next prime is 751688423. The reversal of 751688401 is 104886157.

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

It can be written as a sum of positive squares in 2 ways, for example, as 284091025 + 467597376 = 16855^2 + 21624^2 .

It is a cyclic number.

It is not a de Polignac number, because 751688401 - 2²⁹ = 214817489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (751688701) 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, 50530 + ... + 63691.

It is an arithmetic number, because the mean of its divisors is an integer number (187952301).

Almost surely, 2^751688401 is an apocalyptic number.

It is an amenable number.

751688401 is a deficient number, since it is larger than the sum of its proper divisors (120803).

751688401 is a wasteful number, since it uses less digits than its factorization.

751688401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120802.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 751688401 is about 27416.9363897573. The cubic root of 751688401 is about 909.2415694941.

The spelling of 751688401 in words is "seven hundred fifty-one million, six hundred eighty-eight thousand, four hundred one".