621405467 has 4 divisors (see below), whose sum is σ = 648423120. Its totient is φ = 594387816.

The previous prime is 621405461. The next prime is 621405511. The reversal of 621405467 is 764504126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621405467 is a prime.

It is a super-2 number, since 2×621405467² = 772289508834976178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621405461) 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, 13508792 + ... + 13508837.

It is an arithmetic number, because the mean of its divisors is an integer number (162105780).

Almost surely, 2^621405467 is an apocalyptic number.

621405467 is a deficient number, since it is larger than the sum of its proper divisors (27017653).

621405467 is a wasteful number, since it uses less digits than its factorization.

621405467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27017652.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 621405467 is about 24928.0056763472. The cubic root of 621405467 is about 853.3457370057.

The spelling of 621405467 in words is "six hundred twenty-one million, four hundred five thousand, four hundred sixty-seven".