116397881 has 2 divisors, whose sum is σ = 116397882. Its totient is φ = 116397880.

The previous prime is 116397877. The next prime is 116397887. The reversal of 116397881 is 188793611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 512656 = 10765^2 + 716^2 .

It is an emirp because it is prime and its reverse (188793611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116397881 - 2² = 116397877 is a prime.

It is a super-2 number, since 2×116397881² = 27096933402580322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (116397887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58198940 + 58198941.

It is an arithmetic number, because the mean of its divisors is an integer number (58198941).

Almost surely, 2^116397881 is an apocalyptic number.

It is an amenable number.

116397881 is a deficient number, since it is larger than the sum of its proper divisors (1).

116397881 is an equidigital number, since it uses as much as digits as its factorization.

116397881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 116397881 is about 10788.7849640263. The cubic root of 116397881 is about 488.2568647388.

The spelling of 116397881 in words is "one hundred sixteen million, three hundred ninety-seven thousand, eight hundred eighty-one".