620431919 has 2 divisors, whose sum is σ = 620431920. Its totient is φ = 620431918.

The previous prime is 620431897. The next prime is 620431927. The reversal of 620431919 is 919134026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620431919 - 2⁸ = 620431663 is a prime.

It is a super-2 number, since 2×620431919² = 769871532228045122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620431979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310215959 + 310215960.

It is an arithmetic number, because the mean of its divisors is an integer number (310215960).

Almost surely, 2^620431919 is an apocalyptic number.

620431919 is a deficient number, since it is larger than the sum of its proper divisors (1).

620431919 is an equidigital number, since it uses as much as digits as its factorization.

620431919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 620431919 is about 24908.4708282142. The cubic root of 620431919 is about 852.8998621239.

The spelling of 620431919 in words is "six hundred twenty million, four hundred thirty-one thousand, nine hundred nineteen".