139377069 has 24 divisors (see below), whose sum is σ = 219061752. Its totient is φ = 84879360.

The previous prime is 139377053. The next prime is 139377127. The reversal of 139377069 is 960773931.

It can be written as a sum of positive squares in 4 ways, for example, as 19474569 + 119902500 = 4413^2 + 10950^2 .

It is not a de Polignac number, because 139377069 - 2⁴ = 139377053 is a prime.

It is a super-2 number, since 2×139377069² = 38851934726061522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139377019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5209 + ... + 17489.

It is an arithmetic number, because the mean of its divisors is an integer number (9127573).

Almost surely, 2^139377069 is an apocalyptic number.

It is an amenable number.

139377069 is a deficient number, since it is larger than the sum of its proper divisors (79684683).

139377069 is a wasteful number, since it uses less digits than its factorization.

139377069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397 (or 12394 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 45.

The square root of 139377069 is about 11805.8065798149. The cubic root of 139377069 is about 518.4781304601.

The spelling of 139377069 in words is "one hundred thirty-nine million, three hundred seventy-seven thousand, sixty-nine".