109902309 has 32 divisors (see below), whose sum is σ = 166164480. Its totient is φ = 64032000.

The previous prime is 109902283. The next prime is 109902313. The reversal of 109902309 is 903209901.

It is not a de Polignac number, because 109902309 - 2¹² = 109898213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 109902309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109904309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90909 + ... + 92109.

It is an arithmetic number, because the mean of its divisors is an integer number (5192640).

Almost surely, 2^109902309 is an apocalyptic number.

It is an amenable number.

109902309 is a deficient number, since it is larger than the sum of its proper divisors (56262171).

109902309 is a wasteful number, since it uses less digits than its factorization.

109902309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 109902309 is about 10483.4302115290. The cubic root of 109902309 is about 479.0001016964. Note that the first 3 decimals are identical.

The spelling of 109902309 in words is "one hundred nine million, nine hundred two thousand, three hundred nine".