620446347929 has 2 divisors, whose sum is σ = 620446347930. Its totient is φ = 620446347928.

The previous prime is 620446347919. The next prime is 620446347967. The reversal of 620446347929 is 929743644026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577410015625 + 43036332304 = 759875^2 + 207452^2 .

It is a cyclic number.

It is not a de Polignac number, because 620446347929 - 2⁸ = 620446347673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (620446347919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310223173964 + 310223173965.

It is an arithmetic number, because the mean of its divisors is an integer number (310223173965).

Almost surely, 2^620446347929 is an apocalyptic number.

It is an amenable number.

620446347929 is a deficient number, since it is larger than the sum of its proper divisors (1).

620446347929 is an equidigital number, since it uses as much as digits as its factorization.

620446347929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 620446347929 in words is "six hundred twenty billion, four hundred forty-six million, three hundred forty-seven thousand, nine hundred twenty-nine".