749971657 has 2 divisors, whose sum is σ = 749971658. Its totient is φ = 749971656.

The previous prime is 749971627. The next prime is 749971681. The reversal of 749971657 is 756179947.

749971657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700184521 + 49787136 = 26461^2 + 7056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749971657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 749971598 and 749971607.

It is not a weakly prime, because it can be changed into another prime (749971627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374985828 + 374985829.

It is an arithmetic number, because the mean of its divisors is an integer number (374985829).

Almost surely, 2^749971657 is an apocalyptic number.

It is an amenable number.

749971657 is a deficient number, since it is larger than the sum of its proper divisors (1).

749971657 is an equidigital number, since it uses as much as digits as its factorization.

749971657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 55.

The square root of 749971657 is about 27385.6104003544. The cubic root of 749971657 is about 908.5488512388.

The spelling of 749971657 in words is "seven hundred forty-nine million, nine hundred seventy-one thousand, six hundred fifty-seven".