139149977 has 12 divisors (see below), whose sum is σ = 153253440. Its totient is φ = 126087192.

The previous prime is 139149971. The next prime is 139149991. The reversal of 139149977 is 779941931.

It is a happy number.

It is not a de Polignac number, because 139149977 - 2⁴ = 139149961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139149971) 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 11 ways as a sum of consecutive naturals, for example, 77 + ... + 16682.

It is an arithmetic number, because the mean of its divisors is an integer number (12771120).

Almost surely, 2^139149977 is an apocalyptic number.

It is an amenable number.

139149977 is a deficient number, since it is larger than the sum of its proper divisors (14103463).

139149977 is a wasteful number, since it uses less digits than its factorization.

139149977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16820 (or 16801 counting only the distinct ones).

The product of its digits is 428652, while the sum is 50.

The square root of 139149977 is about 11796.1848493485. The cubic root of 139149977 is about 518.1963857857.

The spelling of 139149977 in words is "one hundred thirty-nine million, one hundred forty-nine thousand, nine hundred seventy-seven".