100718621 has 4 divisors (see below), whose sum is σ = 102221952. Its totient is φ = 99215292.

The previous prime is 100718567. The next prime is 100718623. The reversal of 100718621 is 126817001.

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 100718621 - 2¹⁰ = 100717597 is a prime.

It is a super-2 number, since 2×100718621² = 20288481232283282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100718623) 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, 751565 + ... + 751698.

It is an arithmetic number, because the mean of its divisors is an integer number (25555488).

Almost surely, 2^100718621 is an apocalyptic number.

It is an amenable number.

100718621 is a deficient number, since it is larger than the sum of its proper divisors (1503331).

100718621 is an equidigital number, since it uses as much as digits as its factorization.

100718621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503330.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 100718621 is about 10035.8667288879. The cubic root of 100718621 is about 465.2680783561.

The spelling of 100718621 in words is "one hundred million, seven hundred eighteen thousand, six hundred twenty-one".