109867621 has 2 divisors, whose sum is σ = 109867622. Its totient is φ = 109867620.

The previous prime is 109867613. The next prime is 109867663. The reversal of 109867621 is 126768901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 44742721 = 8070^2 + 6689^2 .

It is a cyclic number.

It is not a de Polignac number, because 109867621 - 2³ = 109867613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109867691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54933810 + 54933811.

It is an arithmetic number, because the mean of its divisors is an integer number (54933811).

Almost surely, 2^109867621 is an apocalyptic number.

It is an amenable number.

109867621 is a deficient number, since it is larger than the sum of its proper divisors (1).

109867621 is an equidigital number, since it uses as much as digits as its factorization.

109867621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 109867621 is about 10481.7756606407. The cubic root of 109867621 is about 478.9497014695.

The spelling of 109867621 in words is "one hundred nine million, eight hundred sixty-seven thousand, six hundred twenty-one".