621432419 has 4 divisors (see below), whose sum is σ = 622297440. Its totient is φ = 620567400.

The previous prime is 621432403. The next prime is 621432421. The reversal of 621432419 is 914234126.

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 621432419 - 2⁴ = 621432403 is a prime.

It is a super-2 number, since 2×621432419² = 772356502768383122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621432439) 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, 431432 + ... + 432869.

It is an arithmetic number, because the mean of its divisors is an integer number (155574360).

Almost surely, 2^621432419 is an apocalyptic number.

621432419 is a deficient number, since it is larger than the sum of its proper divisors (865021).

621432419 is an equidigital number, since it uses as much as digits as its factorization.

621432419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865020.

The product of its digits is 10368, while the sum is 32.

The square root of 621432419 is about 24928.5462672816. The cubic root of 621432419 is about 853.3580741152.

The spelling of 621432419 in words is "six hundred twenty-one million, four hundred thirty-two thousand, four hundred nineteen".