139499577 has 80 divisors (see below), whose sum is σ = 262056960. Its totient is φ = 72106848.

The previous prime is 139499573. The next prime is 139499627. The reversal of 139499577 is 775994931.

It is a happy number.

It is not a de Polignac number, because 139499577 - 2² = 139499573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139499573) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 247498 + ... + 248060.

It is an arithmetic number, because the mean of its divisors is an integer number (3275712).

Almost surely, 2^139499577 is an apocalyptic number.

It is an amenable number.

139499577 is a deficient number, since it is larger than the sum of its proper divisors (122557383).

139499577 is a wasteful number, since it uses less digits than its factorization.

139499577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 615 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 139499577 is about 11810.9939039862. The cubic root of 139499577 is about 518.6299945564.

The spelling of 139499577 in words is "one hundred thirty-nine million, four hundred ninety-nine thousand, five hundred seventy-seven".