139129892 has 48 divisors (see below), whose sum is σ = 274083264. Its totient is φ = 61248000.

The previous prime is 139129877. The next prime is 139129901. The reversal of 139129892 is 298921931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 420167 + ... + 420497.

It is an arithmetic number, because the mean of its divisors is an integer number (5710068).

Almost surely, 2^139129892 is an apocalyptic number.

It is an amenable number.

139129892 is a deficient number, since it is larger than the sum of its proper divisors (134953372).

139129892 is a wasteful number, since it uses less digits than its factorization.

139129892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 618 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The square root of 139129892 is about 11795.3334840521. Note that the first 3 decimals coincide. The cubic root of 139129892 is about 518.1714523160.

It can be divided in two parts, 139 and 129892, that added together give a palindrome (130031).

The spelling of 139129892 in words is "one hundred thirty-nine million, one hundred twenty-nine thousand, eight hundred ninety-two".