109249971 has 16 divisors (see below), whose sum is σ = 149909760. Its totient is φ = 70731360.

The previous prime is 109249967. The next prime is 109249991. The reversal of 109249971 is 179942901.

It is not a de Polignac number, because 109249971 - 2² = 109249967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109249951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21010 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (9369360).

Almost surely, 2^109249971 is an apocalyptic number.

109249971 is a deficient number, since it is larger than the sum of its proper divisors (40659789).

109249971 is a wasteful number, since it uses less digits than its factorization.

109249971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 109249971 is about 10452.2710929252. The cubic root of 109249971 is about 478.0505000245.

The spelling of 109249971 in words is "one hundred nine million, two hundred forty-nine thousand, nine hundred seventy-one".