749579993 has 2 divisors, whose sum is σ = 749579994. Its totient is φ = 749579992.

The previous prime is 749579989. The next prime is 749580043. The reversal of 749579993 is 399975947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712516249 + 37063744 = 26693^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 749579993 - 2² = 749579989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (749579903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374789996 + 374789997.

It is an arithmetic number, because the mean of its divisors is an integer number (374789997).

Almost surely, 2^749579993 is an apocalyptic number.

It is an amenable number.

749579993 is a deficient number, since it is larger than the sum of its proper divisors (1).

749579993 is an equidigital number, since it uses as much as digits as its factorization.

749579993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19289340, while the sum is 62.

The square root of 749579993 is about 27378.4585577786. The cubic root of 749579993 is about 908.3906639983.

The spelling of 749579993 in words is "seven hundred forty-nine million, five hundred seventy-nine thousand, nine hundred ninety-three".