120331639 has 2 divisors, whose sum is σ = 120331640. Its totient is φ = 120331638.

The previous prime is 120331637. The next prime is 120331669. The reversal of 120331639 is 936133021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120331639 - 2¹ = 120331637 is a prime.

Together with 120331637, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120331633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60165819 + 60165820.

It is an arithmetic number, because the mean of its divisors is an integer number (60165820).

Almost surely, 2^120331639 is an apocalyptic number.

120331639 is a deficient number, since it is larger than the sum of its proper divisors (1).

120331639 is an equidigital number, since it uses as much as digits as its factorization.

120331639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 120331639 is about 10969.5778861358. The cubic root of 120331639 is about 493.6963814232.

The spelling of 120331639 in words is "one hundred twenty million, three hundred thirty-one thousand, six hundred thirty-nine".