139872669 has 4 divisors (see below), whose sum is σ = 186496896. Its totient is φ = 93248444.

The previous prime is 139872653. The next prime is 139872673. The reversal of 139872669 is 966278931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139872669 - 2⁴ = 139872653 is a prime.

It is a super-2 number, since 2×139872669² = 39128727066367122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139832669) 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 3 ways as a sum of consecutive naturals, for example, 23312109 + ... + 23312114.

It is an arithmetic number, because the mean of its divisors is an integer number (46624224).

Almost surely, 2^139872669 is an apocalyptic number.

It is an amenable number.

139872669 is a deficient number, since it is larger than the sum of its proper divisors (46624227).

139872669 is an equidigital number, since it uses as much as digits as its factorization.

139872669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46624226.

The product of its digits is 979776, while the sum is 51.

The square root of 139872669 is about 11826.7776253720. Note that the first 3 decimals coincide. The cubic root of 139872669 is about 519.0919420868.

The spelling of 139872669 in words is "one hundred thirty-nine million, eight hundred seventy-two thousand, six hundred sixty-nine".