993879157 has 2 divisors, whose sum is σ = 993879158. Its totient is φ = 993879156.

The previous prime is 993879149. The next prime is 993879181. The reversal of 993879157 is 751978399.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637764516 + 356114641 = 25254^2 + 18871^2 .

It is a cyclic number.

It is not a de Polignac number, because 993879157 - 2³ = 993879149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993873157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496939578 + 496939579.

It is an arithmetic number, because the mean of its divisors is an integer number (496939579).

Almost surely, 2^993879157 is an apocalyptic number.

It is an amenable number.

993879157 is a deficient number, since it is larger than the sum of its proper divisors (1).

993879157 is an equidigital number, since it uses as much as digits as its factorization.

993879157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 58.

The square root of 993879157 is about 31525.8490290111. The cubic root of 993879157 is about 997.9555420401.

The spelling of 993879157 in words is "nine hundred ninety-three million, eight hundred seventy-nine thousand, one hundred fifty-seven".