621103859 has 4 divisors (see below), whose sum is σ = 621224016. Its totient is φ = 620983704.

The previous prime is 621103807. The next prime is 621103871. The reversal of 621103859 is 958301126.

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 621103859 - 2⁸ = 621103603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621123859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51959 + ... + 62784.

It is an arithmetic number, because the mean of its divisors is an integer number (155306004).

Almost surely, 2^621103859 is an apocalyptic number.

621103859 is a deficient number, since it is larger than the sum of its proper divisors (120157).

621103859 is a wasteful number, since it uses less digits than its factorization.

621103859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120156.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 621103859 is about 24921.9553606855. The cubic root of 621103859 is about 853.2076534911.

The spelling of 621103859 in words is "six hundred twenty-one million, one hundred three thousand, eight hundred fifty-nine".