620155793 has 2 divisors, whose sum is σ = 620155794. Its totient is φ = 620155792.

The previous prime is 620155777. The next prime is 620155817. The reversal of 620155793 is 397551026.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373571584 + 246584209 = 19328^2 + 15703^2 .

It is a cyclic number.

It is not a de Polignac number, because 620155793 - 2⁴ = 620155777 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 (620155993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310077896 + 310077897.

It is an arithmetic number, because the mean of its divisors is an integer number (310077897).

Almost surely, 2^620155793 is an apocalyptic number.

It is an amenable number.

620155793 is a deficient number, since it is larger than the sum of its proper divisors (1).

620155793 is an equidigital number, since it uses as much as digits as its factorization.

620155793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 620155793 is about 24902.9273981996. The cubic root of 620155793 is about 852.7733143826.

The spelling of 620155793 in words is "six hundred twenty million, one hundred fifty-five thousand, seven hundred ninety-three".