16311913 has 2 divisors, whose sum is σ = 16311914. Its totient is φ = 16311912.

The previous prime is 16311881. The next prime is 16311929. The reversal of 16311913 is 31911361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11235904 + 5076009 = 3352^2 + 2253^2 .

It is an emirp because it is prime and its reverse (31911361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16311913 - 2⁵ = 16311881 is a prime.

It is not a weakly prime, because it can be changed into another prime (16311943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8155956 + 8155957.

It is an arithmetic number, because the mean of its divisors is an integer number (8155957).

Almost surely, 2^16311913 is an apocalyptic number.

It is an amenable number.

16311913 is a deficient number, since it is larger than the sum of its proper divisors (1).

16311913 is an equidigital number, since it uses as much as digits as its factorization.

16311913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 25.

The square root of 16311913 is about 4038.8009359215. The cubic root of 16311913 is about 253.6111239884.

The spelling of 16311913 in words is "sixteen million, three hundred eleven thousand, nine hundred thirteen".