620461139 has 2 divisors, whose sum is σ = 620461140. Its totient is φ = 620461138.

The previous prime is 620461123. The next prime is 620461157. The reversal of 620461139 is 931164026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620461139 - 2⁴ = 620461123 is a prime.

It is a Chen prime.

It is equal to p_32336159 and since 620461139 and 32336159 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (620461199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310230569 + 310230570.

It is an arithmetic number, because the mean of its divisors is an integer number (310230570).

Almost surely, 2^620461139 is an apocalyptic number.

620461139 is a deficient number, since it is larger than the sum of its proper divisors (1).

620461139 is an equidigital number, since it uses as much as digits as its factorization.

620461139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 620461139 is about 24909.0573687564. The cubic root of 620461139 is about 852.9132513678.

The spelling of 620461139 in words is "six hundred twenty million, four hundred sixty-one thousand, one hundred thirty-nine".