621635241 has 4 divisors (see below), whose sum is σ = 828846992. Its totient is φ = 414423492.

The previous prime is 621635233. The next prime is 621635263. The reversal of 621635241 is 142536126.

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 not a de Polignac number, because 621635241 - 2³ = 621635233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621635199 and 621635208.

It is not an unprimeable number, because it can be changed into a prime (621635341) 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, 103605871 + ... + 103605876.

It is an arithmetic number, because the mean of its divisors is an integer number (207211748).

Almost surely, 2^621635241 is an apocalyptic number.

It is an amenable number.

621635241 is a deficient number, since it is larger than the sum of its proper divisors (207211751).

621635241 is a wasteful number, since it uses less digits than its factorization.

621635241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207211750.

The product of its digits is 8640, while the sum is 30.

The square root of 621635241 is about 24932.6140025469. The cubic root of 621635241 is about 853.4509031768.

The spelling of 621635241 in words is "six hundred twenty-one million, six hundred thirty-five thousand, two hundred forty-one".