621801597 has 16 divisors (see below), whose sum is σ = 840466368. Its totient is φ = 408871680.

The previous prime is 621801589. The next prime is 621801623. The reversal of 621801597 is 795108126.

It is not a de Polignac number, because 621801597 - 2³ = 621801589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621801497) 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 15 ways as a sum of consecutive naturals, for example, 67183 + ... + 75875.

It is an arithmetic number, because the mean of its divisors is an integer number (52529148).

Almost surely, 2^621801597 is an apocalyptic number.

It is an amenable number.

621801597 is a deficient number, since it is larger than the sum of its proper divisors (218664771).

621801597 is a wasteful number, since it uses less digits than its factorization.

621801597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9020.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 621801597 is about 24935.9498916725. The cubic root of 621801597 is about 853.5270271404.

The spelling of 621801597 in words is "six hundred twenty-one million, eight hundred one thousand, five hundred ninety-seven".