116391897 has 24 divisors (see below), whose sum is σ = 174894720. Its totient is φ = 77351760.

The previous prime is 116391893. The next prime is 116391901. The reversal of 116391897 is 798193611.

116391897 is a `hidden beast` number, since 1 + 1 + 639 + 1 + 8 + 9 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (116391893) and next prime (116391901).

It is not a de Polignac number, because 116391897 - 2² = 116391893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (116391893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111504 + ... + 112542.

It is an arithmetic number, because the mean of its divisors is an integer number (7287280).

Almost surely, 2^116391897 is an apocalyptic number.

It is an amenable number.

116391897 is a deficient number, since it is larger than the sum of its proper divisors (58502823).

116391897 is an equidigital number, since it uses as much as digits as its factorization.

116391897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1503 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 116391897 is about 10788.5076354424. The cubic root of 116391897 is about 488.2484975213.

The spelling of 116391897 in words is "one hundred sixteen million, three hundred ninety-one thousand, eight hundred ninety-seven".