116520857 has 2 divisors, whose sum is σ = 116520858. Its totient is φ = 116520856.

The previous prime is 116520827. The next prime is 116520883. The reversal of 116520857 is 758025611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 118336 = 10789^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 116520857 - 2¹² = 116516761 is a prime.

It is a super-2 number, since 2×116520857² = 27154220232028898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (116520827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58260428 + 58260429.

It is an arithmetic number, because the mean of its divisors is an integer number (58260429).

Almost surely, 2^116520857 is an apocalyptic number.

It is an amenable number.

116520857 is a deficient number, since it is larger than the sum of its proper divisors (1).

116520857 is an equidigital number, since it uses as much as digits as its factorization.

116520857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 116520857 is about 10794.4827110890. The cubic root of 116520857 is about 488.4287543023.

It can be divided in two parts, 1165 and 20857, that added together give a palindrome (22022).

The spelling of 116520857 in words is "one hundred sixteen million, five hundred twenty thousand, eight hundred fifty-seven".