621927461 has 4 divisors (see below), whose sum is σ = 628915500. Its totient is φ = 614939424.

The previous prime is 621927419. The next prime is 621927491. The reversal of 621927461 is 164729126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 436559236 + 185368225 = 20894^2 + 13615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621927461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621927491) 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, 3493886 + ... + 3494063.

It is an arithmetic number, because the mean of its divisors is an integer number (157228875).

Almost surely, 2^621927461 is an apocalyptic number.

It is an amenable number.

621927461 is a deficient number, since it is larger than the sum of its proper divisors (6988039).

621927461 is an equidigital number, since it uses as much as digits as its factorization.

621927461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6988038.

The product of its digits is 36288, while the sum is 38.

The square root of 621927461 is about 24938.4735098201. The cubic root of 621927461 is about 853.5846130749.

The spelling of 621927461 in words is "six hundred twenty-one million, nine hundred twenty-seven thousand, four hundred sixty-one".