120890639 has 2 divisors, whose sum is σ = 120890640. Its totient is φ = 120890638.

The previous prime is 120890603. The next prime is 120890641. The reversal of 120890639 is 936098021.

It is a strong prime.

It is an emirp because it is prime and its reverse (936098021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120890639 is a prime.

It is a super-2 number, since 2×120890639² = 29229093195656642, which contains 22 as substring.

Together with 120890641, 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 (120890659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60445319 + 60445320.

It is an arithmetic number, because the mean of its divisors is an integer number (60445320).

Almost surely, 2^120890639 is an apocalyptic number.

120890639 is a deficient number, since it is larger than the sum of its proper divisors (1).

120890639 is an equidigital number, since it uses as much as digits as its factorization.

120890639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 120890639 is about 10995.0279217472. The cubic root of 120890639 is about 494.4596886471.

The spelling of 120890639 in words is "one hundred twenty million, eight hundred ninety thousand, six hundred thirty-nine".