139769649 has 12 divisors (see below), whose sum is σ = 202106112. Its totient is φ = 93079800.

The previous prime is 139769633. The next prime is 139769653. The reversal of 139769649 is 946967931.

It is not a de Polignac number, because 139769649 - 2⁴ = 139769633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139769595 and 139769604.

It is not an unprimeable number, because it can be changed into a prime (139769449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1084 + ... + 16754.

It is an arithmetic number, because the mean of its divisors is an integer number (16842176).

Almost surely, 2^139769649 is an apocalyptic number.

It is an amenable number.

139769649 is a deficient number, since it is larger than the sum of its proper divisors (62336463).

139769649 is a wasteful number, since it uses less digits than its factorization.

139769649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668 (or 16665 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 139769649 is about 11822.4214524775. The cubic root of 139769649 is about 518.9644690390.

The spelling of 139769649 in words is "one hundred thirty-nine million, seven hundred sixty-nine thousand, six hundred forty-nine".