139877929 has 3 divisors (see below), whose sum is σ = 139889757. Its totient is φ = 139866102.

The previous prime is 139877917. The next prime is 139877957. The reversal of 139877929 is 929778931.

The square root of 139877929 is 11827.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 139877929 - 2¹⁷ = 139746857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139877929.

It is not an unprimeable number, because it can be changed into a prime (139827929) 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 2 ways as a sum of consecutive naturals, for example, 5914 + ... + 17740.

It is an arithmetic number, because the mean of its divisors is an integer number (46629919).

Almost surely, 2^139877929 is an apocalyptic number.

139877929 is the 11827-th square number.

139877929 is the 5914-th centered octagonal number.

It is an amenable number.

139877929 is a deficient number, since it is larger than the sum of its proper divisors (11828).

139877929 is an frugal number, since it uses more digits than its factorization.

139877929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23654 (or 11827 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 55.

The cubic root of 139877929 is about 519.0984489320.

The spelling of 139877929 in words is "one hundred thirty-nine million, eight hundred seventy-seven thousand, nine hundred twenty-nine".