621245971 has 2 divisors, whose sum is σ = 621245972. Its totient is φ = 621245970.

The previous prime is 621245957. The next prime is 621245993. The reversal of 621245971 is 179542126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621245971 - 2¹⁷ = 621114899 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621245971.

It is not a weakly prime, because it can be changed into another prime (621245771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310622985 + 310622986.

It is an arithmetic number, because the mean of its divisors is an integer number (310622986).

Almost surely, 2^621245971 is an apocalyptic number.

621245971 is a deficient number, since it is larger than the sum of its proper divisors (1).

621245971 is an equidigital number, since it uses as much as digits as its factorization.

621245971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 621245971 is about 24924.8063382647. The cubic root of 621245971 is about 853.2727214063.

The spelling of 621245971 in words is "six hundred twenty-one million, two hundred forty-five thousand, nine hundred seventy-one".