139103057 has 4 divisors (see below), whose sum is σ = 145151040. Its totient is φ = 133055076.

The previous prime is 139103039. The next prime is 139103071. The reversal of 139103057 is 750301931.

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: 750301931 = 1201 ⋅624731.

It is a cyclic number.

It is not a de Polignac number, because 139103057 - 2¹² = 139098961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139103077) 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, 3023957 + ... + 3024002.

It is an arithmetic number, because the mean of its divisors is an integer number (36287760).

Almost surely, 2^139103057 is an apocalyptic number.

It is an amenable number.

139103057 is a deficient number, since it is larger than the sum of its proper divisors (6047983).

139103057 is an equidigital number, since it uses as much as digits as its factorization.

139103057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047982.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 139103057 is about 11794.1959030703. The cubic root of 139103057 is about 518.1381356678.

Adding to 139103057 its reverse (750301931), we get a palindrome (889404988).

The spelling of 139103057 in words is "one hundred thirty-nine million, one hundred three thousand, fifty-seven".