621849323 has 2 divisors, whose sum is σ = 621849324. Its totient is φ = 621849322.

The previous prime is 621849253. The next prime is 621849353. The reversal of 621849323 is 323948126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621849323 - 2¹⁰ = 621848299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (621849353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310924661 + 310924662.

It is an arithmetic number, because the mean of its divisors is an integer number (310924662).

Almost surely, 2^621849323 is an apocalyptic number.

621849323 is a deficient number, since it is larger than the sum of its proper divisors (1).

621849323 is an equidigital number, since it uses as much as digits as its factorization.

621849323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 621849323 is about 24936.9068450760. The cubic root of 621849323 is about 853.5488638962.

The spelling of 621849323 in words is "six hundred twenty-one million, eight hundred forty-nine thousand, three hundred twenty-three".