116640857 has 2 divisors, whose sum is σ = 116640858. Its totient is φ = 116640856.

The previous prime is 116640827. The next prime is 116640899. The reversal of 116640857 is 758046611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67584841 + 49056016 = 8221^2 + 7004^2 .

It is a cyclic number.

It is not a de Polignac number, because 116640857 - 2¹² = 116636761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 116640857.

It is not a weakly prime, because it can be changed into another prime (116640827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58320428 + 58320429.

It is an arithmetic number, because the mean of its divisors is an integer number (58320429).

Almost surely, 2^116640857 is an apocalyptic number.

It is an amenable number.

116640857 is a deficient number, since it is larger than the sum of its proper divisors (1).

116640857 is an equidigital number, since it uses as much as digits as its factorization.

116640857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 116640857 is about 10800.0396758530. The cubic root of 116640857 is about 488.5963676178.

The spelling of 116640857 in words is "one hundred sixteen million, six hundred forty thousand, eight hundred fifty-seven".