120788639 has 2 divisors, whose sum is σ = 120788640. Its totient is φ = 120788638.

The previous prime is 120788623. The next prime is 120788641. The reversal of 120788639 is 936887021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120788639 - 2⁴ = 120788623 is a prime.

It is a super-2 number, since 2×120788639² = 29179790622944642, which contains 22 as substring.

Together with 120788641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120788639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120788669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60394319 + 60394320.

It is an arithmetic number, because the mean of its divisors is an integer number (60394320).

Almost surely, 2^120788639 is an apocalyptic number.

120788639 is a deficient number, since it is larger than the sum of its proper divisors (1).

120788639 is an equidigital number, since it uses as much as digits as its factorization.

120788639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 120788639 is about 10990.3884826698. The cubic root of 120788639 is about 494.3205847431.

The spelling of 120788639 in words is "one hundred twenty million, seven hundred eighty-eight thousand, six hundred thirty-nine".