621612263 has 4 divisors (see below), whose sum is σ = 621743208. Its totient is φ = 621481320.

The previous prime is 621612253. The next prime is 621612269. The reversal of 621612263 is 362216126.

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 621612263 - 2²² = 617417959 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 (621612269) 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, 58073 + ... + 67938.

It is an arithmetic number, because the mean of its divisors is an integer number (155435802).

Almost surely, 2^621612263 is an apocalyptic number.

621612263 is a deficient number, since it is larger than the sum of its proper divisors (130945).

621612263 is a wasteful number, since it uses less digits than its factorization.

621612263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130944.

The product of its digits is 5184, while the sum is 29.

The square root of 621612263 is about 24932.1531962243. The cubic root of 621612263 is about 853.4403874514.

Adding to 621612263 its reverse (362216126), we get a palindrome (983828389).

The spelling of 621612263 in words is "six hundred twenty-one million, six hundred twelve thousand, two hundred sixty-three".