621079513 has 16 divisors (see below), whose sum is σ = 682988544. Its totient is φ = 562222080.

The previous prime is 621079483. The next prime is 621079517. The reversal of 621079513 is 315970126.

621079513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 621079513 - 2⁹ = 621079001 is a prime.

It is a super-2 number, since 2×621079513² = 771479522936634338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621079517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84481 + ... + 91537.

It is an arithmetic number, because the mean of its divisors is an integer number (42686784).

Almost surely, 2^621079513 is an apocalyptic number.

It is an amenable number.

621079513 is a deficient number, since it is larger than the sum of its proper divisors (61909031).

621079513 is a wasteful number, since it uses less digits than its factorization.

621079513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 621079513 is about 24921.4669110789. The cubic root of 621079513 is about 853.1965053476.

The spelling of 621079513 in words is "six hundred twenty-one million, seventy-nine thousand, five hundred thirteen".