139429057 has 4 divisors (see below), whose sum is σ = 139518720. Its totient is φ = 139339396.

The previous prime is 139429039. The next prime is 139429063. The reversal of 139429057 is 750924931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750924931 = 15373 ⋅48847.

It is a cyclic number.

It is not a de Polignac number, because 139429057 - 2¹¹ = 139427009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139429067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42457 + ... + 45622.

It is an arithmetic number, because the mean of its divisors is an integer number (34879680).

Almost surely, 2^139429057 is an apocalyptic number.

It is an amenable number.

139429057 is a deficient number, since it is larger than the sum of its proper divisors (89663).

139429057 is an equidigital number, since it uses as much as digits as its factorization.

139429057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89662.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 139429057 is about 11808.0081724226. The cubic root of 139429057 is about 518.5425869989.

The spelling of 139429057 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, fifty-seven".