621424567 has 2 divisors, whose sum is σ = 621424568. Its totient is φ = 621424566.

The previous prime is 621424549. The next prime is 621424571. The reversal of 621424567 is 765424126.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621424567 is a prime.

It is a super-2 number, since 2×621424567² = 772336984942274978, which contains 22 as substring.

It is equal to p_32383729 and since 621424567 and 32383729 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621424537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310712283 + 310712284.

It is an arithmetic number, because the mean of its divisors is an integer number (310712284).

Almost surely, 2^621424567 is an apocalyptic number.

621424567 is a deficient number, since it is larger than the sum of its proper divisors (1).

621424567 is an equidigital number, since it uses as much as digits as its factorization.

621424567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 621424567 is about 24928.3887766538. The cubic root of 621424567 is about 853.3544799481.

The spelling of 621424567 in words is "six hundred twenty-one million, four hundred twenty-four thousand, five hundred sixty-seven".