2113913 has 2 divisors, whose sum is σ = 2113914. Its totient is φ = 2113912.

The previous prime is 2113901. The next prime is 2113931. The reversal of 2113913 is 3193112.

Together with next prime (2113931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111209 + 2704 = 1453^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113913 - 2¹⁸ = 1851769 is a prime.

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 (2113973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056956 + 1056957.

It is an arithmetic number, because the mean of its divisors is an integer number (1056957).

2^2113913 is an apocalyptic number.

It is an amenable number.

2113913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113913 is an equidigital number, since it uses as much as digits as its factorization.

2113913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 2113913 is about 1453.9301908964. The cubic root of 2113913 is about 128.3400989668.

The spelling of 2113913 in words is "two million, one hundred thirteen thousand, nine hundred thirteen".