620908571 has 2 divisors, whose sum is σ = 620908572. Its totient is φ = 620908570.

The previous prime is 620908567. The next prime is 620908573. The reversal of 620908571 is 175809026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620908571 - 2² = 620908567 is a prime.

Together with 620908573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620908573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310454285 + 310454286.

It is an arithmetic number, because the mean of its divisors is an integer number (310454286).

Almost surely, 2^620908571 is an apocalyptic number.

620908571 is a deficient number, since it is larger than the sum of its proper divisors (1).

620908571 is an equidigital number, since it uses as much as digits as its factorization.

620908571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 620908571 is about 24918.0370615344. The cubic root of 620908571 is about 853.1182220270.

The spelling of 620908571 in words is "six hundred twenty million, nine hundred eight thousand, five hundred seventy-one".