139840927 has 2 divisors, whose sum is σ = 139840928. Its totient is φ = 139840926.

The previous prime is 139840919. The next prime is 139840951. The reversal of 139840927 is 729048931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139840927 - 2³ = 139840919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139840027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69920463 + 69920464.

It is an arithmetic number, because the mean of its divisors is an integer number (69920464).

Almost surely, 2^139840927 is an apocalyptic number.

139840927 is a deficient number, since it is larger than the sum of its proper divisors (1).

139840927 is an equidigital number, since it uses as much as digits as its factorization.

139840927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 139840927 is about 11825.4355945141. The cubic root of 139840927 is about 519.0526724113.

The spelling of 139840927 in words is "one hundred thirty-nine million, eight hundred forty thousand, nine hundred twenty-seven".