916121113 has 2 divisors, whose sum is σ = 916121114. Its totient is φ = 916121112.

The previous prime is 916121111. The next prime is 916121123. The reversal of 916121113 is 311121619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842624784 + 73496329 = 29028^2 + 8573^2 .

It is a cyclic number.

It is not a de Polignac number, because 916121113 - 2¹ = 916121111 is a prime.

Together with 916121111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (916121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458060556 + 458060557.

It is an arithmetic number, because the mean of its divisors is an integer number (458060557).

Almost surely, 2^916121113 is an apocalyptic number.

It is an amenable number.

916121113 is a deficient number, since it is larger than the sum of its proper divisors (1).

916121113 is an equidigital number, since it uses as much as digits as its factorization.

916121113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 25.

The square root of 916121113 is about 30267.4926777888. The cubic root of 916121113 is about 971.2200303696.

The spelling of 916121113 in words is "nine hundred sixteen million, one hundred twenty-one thousand, one hundred thirteen".