139671870529 has 9 divisors (see below), whose sum is σ = 146017576803. Its totient is φ = 133590958512.

The previous prime is 139671870521. The next prime is 139671870553. The reversal of 139671870529 is 925078176931.

The square root of 139671870529 is 373727.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 83332100929 + 56339769600 = 288673^2 + 237360^2 .

It is not a de Polignac number, because 139671870529 - 2³ = 139671870521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139671870521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8587597 + ... + 8603845.

Almost surely, 2^139671870529 is an apocalyptic number.

139671870529 is the 373727-th square number.

139671870529 is the 186864-th centered octagonal number.

It is an amenable number.

139671870529 is a deficient number, since it is larger than the sum of its proper divisors (6345706274).

139671870529 is an frugal number, since it uses more digits than its factorization.

139671870529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32544 (or 16272 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 139671870529 in words is "one hundred thirty-nine billion, six hundred seventy-one million, eight hundred seventy thousand, five hundred twenty-nine".