752997101621 has 2 divisors, whose sum is σ = 752997101622. Its totient is φ = 752997101620.

The previous prime is 752997101617. The next prime is 752997101713. The reversal of 752997101621 is 126101799257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672744444100 + 80252657521 = 820210^2 + 283289^2 .

It is a cyclic number.

It is not a de Polignac number, because 752997101621 - 2² = 752997101617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 752997101621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (752997101221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 376498550810 + 376498550811.

It is an arithmetic number, because the mean of its divisors is an integer number (376498550811).

Almost surely, 2^752997101621 is an apocalyptic number.

It is an amenable number.

752997101621 is a deficient number, since it is larger than the sum of its proper divisors (1).

752997101621 is an equidigital number, since it uses as much as digits as its factorization.

752997101621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 50.

The spelling of 752997101621 in words is "seven hundred fifty-two billion, nine hundred ninety-seven million, one hundred one thousand, six hundred twenty-one".