139232651 has 4 divisors (see below), whose sum is σ = 139323072. Its totient is φ = 139142232.

The previous prime is 139232623. The next prime is 139232657. The reversal of 139232651 is 156232931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139232651 - 2¹⁴ = 139216267 is a prime.

It is a super-2 number, since 2×139232651² = 38771462208975602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139232657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42860 + ... + 45993.

It is an arithmetic number, because the mean of its divisors is an integer number (34830768).

Almost surely, 2^139232651 is an apocalyptic number.

139232651 is a deficient number, since it is larger than the sum of its proper divisors (90421).

139232651 is an equidigital number, since it uses as much as digits as its factorization.

139232651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90420.

The product of its digits is 9720, while the sum is 32.

The square root of 139232651 is about 11799.6885975860. The cubic root of 139232651 is about 518.2989918304.

Subtracting from 139232651 its product of digits (9720), we obtain a palindrome (139222931).

It can be divided in two parts, 1392 and 32651, that added together give a palindrome (34043).

The spelling of 139232651 in words is "one hundred thirty-nine million, two hundred thirty-two thousand, six hundred fifty-one".