139893157 has 2 divisors, whose sum is σ = 139893158. Its totient is φ = 139893156.

The previous prime is 139893151. The next prime is 139893227. The reversal of 139893157 is 751398931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101626561 + 38266596 = 10081^2 + 6186^2 .

It is a cyclic number.

It is not a de Polignac number, because 139893157 - 2²⁷ = 5675429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139893151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69946578 + 69946579.

It is an arithmetic number, because the mean of its divisors is an integer number (69946579).

Almost surely, 2^139893157 is an apocalyptic number.

It is an amenable number.

139893157 is a deficient number, since it is larger than the sum of its proper divisors (1).

139893157 is an equidigital number, since it uses as much as digits as its factorization.

139893157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 46.

The square root of 139893157 is about 11827.6437636581. The cubic root of 139893157 is about 519.1172857001.

The spelling of 139893157 in words is "one hundred thirty-nine million, eight hundred ninety-three thousand, one hundred fifty-seven".