139275949 has 4 divisors (see below), whose sum is σ = 140553820. Its totient is φ = 137998080.

The previous prime is 139275889. The next prime is 139275977. The reversal of 139275949 is 949572931.

139275949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949572931 = 193 ⋅4920067.

It can be written as a sum of positive squares in 2 ways, for example, as 114704100 + 24571849 = 10710^2 + 4957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139275949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139275979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638772 + ... + 638989.

It is an arithmetic number, because the mean of its divisors is an integer number (35138455).

Almost surely, 2^139275949 is an apocalyptic number.

It is an amenable number.

139275949 is a deficient number, since it is larger than the sum of its proper divisors (1277871).

139275949 is a wasteful number, since it uses less digits than its factorization.

139275949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277870.

The product of its digits is 612360, while the sum is 49.

The square root of 139275949 is about 11801.5231644055. The cubic root of 139275949 is about 518.3527124286.

The spelling of 139275949 in words is "one hundred thirty-nine million, two hundred seventy-five thousand, nine hundred forty-nine".