620943977 has 4 divisors (see below), whose sum is σ = 621626496. Its totient is φ = 620261460.

The previous prime is 620943923. The next prime is 620943979. The reversal of 620943977 is 779349026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620943977 - 2¹⁶ = 620878441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620943979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339893 + ... + 341714.

It is an arithmetic number, because the mean of its divisors is an integer number (155406624).

Almost surely, 2^620943977 is an apocalyptic number.

It is an amenable number.

620943977 is a deficient number, since it is larger than the sum of its proper divisors (682519).

620943977 is an equidigital number, since it uses as much as digits as its factorization.

620943977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682518.

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 620943977 is about 24918.7475006269. The cubic root of 620943977 is about 853.1344374738.

The spelling of 620943977 in words is "six hundred twenty million, nine hundred forty-three thousand, nine hundred seventy-seven".