752497621 has 2 divisors, whose sum is σ = 752497622. Its totient is φ = 752497620.

The previous prime is 752497619. The next prime is 752497631. The reversal of 752497621 is 126794257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751527396 + 970225 = 27414^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 752497621 - 2¹ = 752497619 is a prime.

It is a super-2 number, since 2×752497621² = 1132505339221319282, which contains 22 as substring.

Together with 752497619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (752497631) 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 as a sum of consecutive naturals, namely, 376248810 + 376248811.

It is an arithmetic number, because the mean of its divisors is an integer number (376248811).

Almost surely, 2^752497621 is an apocalyptic number.

It is an amenable number.

752497621 is a deficient number, since it is larger than the sum of its proper divisors (1).

752497621 is an equidigital number, since it uses as much as digits as its factorization.

752497621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 752497621 is about 27431.6900864675. The cubic root of 752497621 is about 909.5677297265.

The spelling of 752497621 in words is "seven hundred fifty-two million, four hundred ninety-seven thousand, six hundred twenty-one".