621656467 has 4 divisors (see below), whose sum is σ = 622163520. Its totient is φ = 621149416.

The previous prime is 621656449. The next prime is 621656501. The reversal of 621656467 is 764656126.

It is a happy number.

621656467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621656467 - 2⁷ = 621656339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621606467) 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, 251683 + ... + 254140.

It is an arithmetic number, because the mean of its divisors is an integer number (155540880).

Almost surely, 2^621656467 is an apocalyptic number.

621656467 is a deficient number, since it is larger than the sum of its proper divisors (507053).

621656467 is a wasteful number, since it uses less digits than its factorization.

621656467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507052.

The product of its digits is 362880, while the sum is 43.

The square root of 621656467 is about 24933.0396662741. The cubic root of 621656467 is about 853.4606168810.

The spelling of 621656467 in words is "six hundred twenty-one million, six hundred fifty-six thousand, four hundred sixty-seven".