620597791 has 4 divisors (see below), whose sum is σ = 677015784. Its totient is φ = 564179800.

The previous prime is 620597743. The next prime is 620597821. The reversal of 620597791 is 197795026.

It is a happy number.

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 620597791 - 2¹⁷ = 620466719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620597491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28208980 + ... + 28209001.

It is an arithmetic number, because the mean of its divisors is an integer number (169253946).

Almost surely, 2^620597791 is an apocalyptic number.

620597791 is a deficient number, since it is larger than the sum of its proper divisors (56417993).

620597791 is a wasteful number, since it uses less digits than its factorization.

620597791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56417992.

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 620597791 is about 24911.8002360327. The cubic root of 620597791 is about 852.9758627272.

The spelling of 620597791 in words is "six hundred twenty million, five hundred ninety-seven thousand, seven hundred ninety-one".