123213139 has 16 divisors (see below), whose sum is σ = 147571200. Its totient is φ = 100584000.

The previous prime is 123213137. The next prime is 123213143. The reversal of 123213139 is 931312321.

It is a cyclic number.

It is not a de Polignac number, because 123213139 - 2¹ = 123213137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123213137) 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 15 ways as a sum of consecutive naturals, for example, 38887 + ... + 41935.

It is an arithmetic number, because the mean of its divisors is an integer number (9223200).

Almost surely, 2^123213139 is an apocalyptic number.

123213139 is a deficient number, since it is larger than the sum of its proper divisors (24358061).

123213139 is a wasteful number, since it uses less digits than its factorization.

123213139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330.

The product of its digits is 972, while the sum is 25.

The square root of 123213139 is about 11100.1413954958. The cubic root of 123213139 is about 497.6060752072.

The spelling of 123213139 in words is "one hundred twenty-three million, two hundred thirteen thousand, one hundred thirty-nine".