2113957 has 2 divisors, whose sum is σ = 2113958. Its totient is φ = 2113956.

The previous prime is 2113949. The next prime is 2113973. The reversal of 2113957 is 7593112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 408321 = 1306^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113957 - 2³ = 2113949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056978 + 1056979.

It is an arithmetic number, because the mean of its divisors is an integer number (1056979).

2^2113957 is an apocalyptic number.

It is an amenable number.

2113957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113957 is an equidigital number, since it uses as much as digits as its factorization.

2113957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 28.

The square root of 2113957 is about 1453.9453222181. The cubic root of 2113957 is about 128.3409894048.

The spelling of 2113957 in words is "two million, one hundred thirteen thousand, nine hundred fifty-seven".