120620639 has 2 divisors, whose sum is σ = 120620640. Its totient is φ = 120620638.

The previous prime is 120620609. The next prime is 120620653. The reversal of 120620639 is 936026021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120620639 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120620609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60310319 + 60310320.

It is an arithmetic number, because the mean of its divisors is an integer number (60310320).

Almost surely, 2^120620639 is an apocalyptic number.

120620639 is a deficient number, since it is larger than the sum of its proper divisors (1).

120620639 is an equidigital number, since it uses as much as digits as its factorization.

120620639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 120620639 is about 10982.7427812910. The cubic root of 120620639 is about 494.0913016185.

The spelling of 120620639 in words is "one hundred twenty million, six hundred twenty thousand, six hundred thirty-nine".