2139047 has 2 divisors, whose sum is σ = 2139048. Its totient is φ = 2139046.

The previous prime is 2139043. The next prime is 2139091. The reversal of 2139047 is 7409312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139047 - 2² = 2139043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069523 + 1069524.

It is an arithmetic number, because the mean of its divisors is an integer number (1069524).

2^2139047 is an apocalyptic number.

2139047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139047 is an equidigital number, since it uses as much as digits as its factorization.

2139047 is an evil number, because the sum of its binary digits is even.

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

The square root of 2139047 is about 1462.5481188665. The cubic root of 2139047 is about 128.8467422585.

The spelling of 2139047 in words is "two million, one hundred thirty-nine thousand, forty-seven".