139971059 has 2 divisors, whose sum is σ = 139971060. Its totient is φ = 139971058.

The previous prime is 139971053. The next prime is 139971071. The reversal of 139971059 is 950179931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139971059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139971053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69985529 + 69985530.

It is an arithmetic number, because the mean of its divisors is an integer number (69985530).

Almost surely, 2^139971059 is an apocalyptic number.

139971059 is a deficient number, since it is larger than the sum of its proper divisors (1).

139971059 is an equidigital number, since it uses as much as digits as its factorization.

139971059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 139971059 is about 11830.9365225243. The cubic root of 139971059 is about 519.2136277260.

The spelling of 139971059 in words is "one hundred thirty-nine million, nine hundred seventy-one thousand, fifty-nine".