2139407 has 2 divisors, whose sum is σ = 2139408. Its totient is φ = 2139406.

The previous prime is 2139383. The next prime is 2139409. The reversal of 2139407 is 7049312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139407 is a prime.

Together with 2139409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069703 + 1069704.

It is an arithmetic number, because the mean of its divisors is an integer number (1069704).

2^2139407 is an apocalyptic number.

2139407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139407 is an equidigital number, since it uses as much as digits as its factorization.

2139407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2139407 is about 1462.6711865624. The cubic root of 2139407 is about 128.8539701229.

The spelling of 2139407 in words is "two million, one hundred thirty-nine thousand, four hundred seven".