621525623 has 4 divisors (see below), whose sum is σ = 621708360. Its totient is φ = 621342888.

The previous prime is 621525599. The next prime is 621525631. The reversal of 621525623 is 326525126.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326525126 = 2 ⋅163262563.

It is a cyclic number.

It is not a de Polignac number, because 621525623 - 2⁸ = 621525367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621525623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621525643) 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, 86168 + ... + 93101.

It is an arithmetic number, because the mean of its divisors is an integer number (155427090).

Almost surely, 2^621525623 is an apocalyptic number.

621525623 is a deficient number, since it is larger than the sum of its proper divisors (182737).

621525623 is a wasteful number, since it uses less digits than its factorization.

621525623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182736.

The product of its digits is 21600, while the sum is 32.

The square root of 621525623 is about 24930.4156202820. The cubic root of 621525623 is about 853.4007349138.

The spelling of 621525623 in words is "six hundred twenty-one million, five hundred twenty-five thousand, six hundred twenty-three".