620577659 has 4 divisors (see below), whose sum is σ = 668314416. Its totient is φ = 572840904.

The previous prime is 620577649. The next prime is 620577703. The reversal of 620577659 is 956775026.

620577659 = 3970² + 3971² + ... + 4008².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620577659 - 2⁸ = 620577403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620577619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23868359 + ... + 23868384.

It is an arithmetic number, because the mean of its divisors is an integer number (167078604).

Almost surely, 2^620577659 is an apocalyptic number.

620577659 is a deficient number, since it is larger than the sum of its proper divisors (47736757).

620577659 is a wasteful number, since it uses less digits than its factorization.

620577659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47736756.

The product of its (nonzero) digits is 793800, while the sum is 47.

The square root of 620577659 is about 24911.3961672163. The cubic root of 620577659 is about 852.9666392032.

The spelling of 620577659 in words is "six hundred twenty million, five hundred seventy-seven thousand, six hundred fifty-nine".