621723453 has 48 divisors (see below), whose sum is σ = 952361280. Its totient is φ = 359603712.

The previous prime is 621723449. The next prime is 621723461. The reversal of 621723453 is 354327126.

It is not a de Polignac number, because 621723453 - 2² = 621723449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621723253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2244351 + ... + 2244627.

It is an arithmetic number, because the mean of its divisors is an integer number (19840860).

Almost surely, 2^621723453 is an apocalyptic number.

It is an amenable number.

621723453 is a deficient number, since it is larger than the sum of its proper divisors (330637827).

621723453 is a wasteful number, since it uses less digits than its factorization.

621723453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 545 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 621723453 is about 24934.3829480499. The cubic root of 621723453 is about 853.4912703918.

The spelling of 621723453 in words is "six hundred twenty-one million, seven hundred twenty-three thousand, four hundred fifty-three".