109621863 has 16 divisors (see below), whose sum is σ = 174895840. Its totient is φ = 67459392.

The previous prime is 109621847. The next prime is 109621903. The reversal of 109621863 is 368126901.

It is not a de Polignac number, because 109621863 - 2⁴ = 109621847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109621063) 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 in 15 ways as a sum of consecutive naturals, for example, 155806 + ... + 156507.

It is an arithmetic number, because the mean of its divisors is an integer number (10930990).

Almost surely, 2^109621863 is an apocalyptic number.

109621863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

109621863 is a deficient number, since it is larger than the sum of its proper divisors (65273977).

109621863 is a wasteful number, since it uses less digits than its factorization.

109621863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312335 (or 312329 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 109621863 is about 10470.0459884377. The cubic root of 109621863 is about 478.5923210983.

The spelling of 109621863 in words is "one hundred nine million, six hundred twenty-one thousand, eight hundred sixty-three".