621496513 has 4 divisors (see below), whose sum is σ = 677996208. Its totient is φ = 564996820.

The previous prime is 621496493. The next prime is 621496529. The reversal of 621496513 is 315694126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621496513 - 2⁵ = 621496481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621496543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28249831 + ... + 28249852.

It is an arithmetic number, because the mean of its divisors is an integer number (169499052).

Almost surely, 2^621496513 is an apocalyptic number.

It is an amenable number.

621496513 is a deficient number, since it is larger than the sum of its proper divisors (56499695).

621496513 is a wasteful number, since it uses less digits than its factorization.

621496513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56499694.

The product of its digits is 38880, while the sum is 37.

The square root of 621496513 is about 24929.8317884417. The cubic root of 621496513 is about 853.3874113101.

The spelling of 621496513 in words is "six hundred twenty-one million, four hundred ninety-six thousand, five hundred thirteen".