621453427 has 6 divisors (see below), whose sum is σ = 722915268. Its totient is φ = 532674324.

The previous prime is 621453419. The next prime is 621453439. The reversal of 621453427 is 724354126.

It is not a de Polignac number, because 621453427 - 2³ = 621453419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621453392 and 621453401.

It is not an unprimeable number, because it can be changed into a prime (621453407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6341313 + ... + 6341410.

It is an arithmetic number, because the mean of its divisors is an integer number (120485878).

Almost surely, 2^621453427 is an apocalyptic number.

621453427 is a deficient number, since it is larger than the sum of its proper divisors (101461841).

621453427 is a wasteful number, since it uses less digits than its factorization.

621453427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12682737 (or 12682730 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 621453427 is about 24928.9676280427. The cubic root of 621453427 is about 853.3676901484.

The spelling of 621453427 in words is "six hundred twenty-one million, four hundred fifty-three thousand, four hundred twenty-seven".