2139937 has 2 divisors, whose sum is σ = 2139938. Its totient is φ = 2139936.

The previous prime is 2139931. The next prime is 2139947. The reversal of 2139937 is 7399312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2062096 + 77841 = 1436^2 + 279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069968 + 1069969.

It is an arithmetic number, because the mean of its divisors is an integer number (1069969).

2^2139937 is an apocalyptic number.

It is an amenable number.

2139937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139937 is an equidigital number, since it uses as much as digits as its factorization.

2139937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 34.

The square root of 2139937 is about 1462.8523507176. The cubic root of 2139937 is about 128.8646096701.

The spelling of 2139937 in words is "two million, one hundred thirty-nine thousand, nine hundred thirty-seven".