793145921 has 2 divisors, whose sum is σ = 793145922. Its totient is φ = 793145920.

The previous prime is 793145917. The next prime is 793145939. The reversal of 793145921 is 129541397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602015296 + 191130625 = 24536^2 + 13825^2 .

It is a cyclic number.

It is not a de Polignac number, because 793145921 - 2² = 793145917 is a prime.

It is not a weakly prime, because it can be changed into another prime (793145981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396572960 + 396572961.

It is an arithmetic number, because the mean of its divisors is an integer number (396572961).

Almost surely, 2^793145921 is an apocalyptic number.

It is an amenable number.

793145921 is a deficient number, since it is larger than the sum of its proper divisors (1).

793145921 is an equidigital number, since it uses as much as digits as its factorization.

793145921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 793145921 is about 28162.8464648018. The cubic root of 793145921 is about 925.6590077645.

The spelling of 793145921 in words is "seven hundred ninety-three million, one hundred forty-five thousand, nine hundred twenty-one".