100366621 has 2 divisors, whose sum is σ = 100366622. Its totient is φ = 100366620.

The previous prime is 100366613. The next prime is 100366631. The reversal of 100366621 is 126663001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 42758521 = 7590^2 + 6539^2 .

It is a cyclic number.

It is not a de Polignac number, because 100366621 - 2³ = 100366613 is a prime.

It is a super-2 number, since 2×100366621² = 20146917221915282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100366631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50183310 + 50183311.

It is an arithmetic number, because the mean of its divisors is an integer number (50183311).

Almost surely, 2^100366621 is an apocalyptic number.

It is an amenable number.

100366621 is a deficient number, since it is larger than the sum of its proper divisors (1).

100366621 is an equidigital number, since it uses as much as digits as its factorization.

100366621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 100366621 is about 10018.3142793586. The cubic root of 100366621 is about 464.7254262159.

The spelling of 100366621 in words is "one hundred million, three hundred sixty-six thousand, six hundred twenty-one".