139995371 has 2 divisors, whose sum is σ = 139995372. Its totient is φ = 139995370.

The previous prime is 139995341. The next prime is 139995389. The reversal of 139995371 is 173599931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139995371 - 2¹⁸ = 139733227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139995311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69997685 + 69997686.

It is an arithmetic number, because the mean of its divisors is an integer number (69997686).

Almost surely, 2^139995371 is an apocalyptic number.

139995371 is a deficient number, since it is larger than the sum of its proper divisors (1).

139995371 is an equidigital number, since it uses as much as digits as its factorization.

139995371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229635, while the sum is 47.

The square root of 139995371 is about 11831.9639536300. The cubic root of 139995371 is about 519.2436872517.

The spelling of 139995371 in words is "one hundred thirty-nine million, nine hundred ninety-five thousand, three hundred seventy-one".