139472649 has 12 divisors (see below), whose sum is σ = 201669312. Its totient is φ = 92885400.

The previous prime is 139472633. The next prime is 139472653. The reversal of 139472649 is 946274931.

It is a happy number.

139472649 is a `hidden beast` number, since 139 + 472 + 6 + 49 = 666.

It is not a de Polignac number, because 139472649 - 2⁴ = 139472633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139472699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1764 + ... + 16794.

It is an arithmetic number, because the mean of its divisors is an integer number (16805776).

Almost surely, 2^139472649 is an apocalyptic number.

It is an amenable number.

139472649 is a deficient number, since it is larger than the sum of its proper divisors (62196663).

139472649 is a wasteful number, since it uses less digits than its factorization.

139472649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16068 (or 16065 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 139472649 is about 11809.8538941005. The cubic root of 139472649 is about 518.5966215347.

The spelling of 139472649 in words is "one hundred thirty-nine million, four hundred seventy-two thousand, six hundred forty-nine".