621623347 has 4 divisors (see below), whose sum is σ = 638424016. Its totient is φ = 604822680.

The previous prime is 621623339. The next prime is 621623357. The reversal of 621623347 is 743326126.

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 621623347 - 2³ = 621623339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621623357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8400279 + ... + 8400352.

It is an arithmetic number, because the mean of its divisors is an integer number (159606004).

Almost surely, 2^621623347 is an apocalyptic number.

621623347 is a deficient number, since it is larger than the sum of its proper divisors (16800669).

621623347 is a wasteful number, since it uses less digits than its factorization.

621623347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800668.

The product of its digits is 36288, while the sum is 34.

The square root of 621623347 is about 24932.3754784818. The cubic root of 621623347 is about 853.4454600009.

The spelling of 621623347 in words is "six hundred twenty-one million, six hundred twenty-three thousand, three hundred forty-seven".