109145997 has 24 divisors (see below), whose sum is σ = 162562400. Its totient is φ = 70525728.

The previous prime is 109145989. The next prime is 109146029. The reversal of 109145997 is 799541901.

109145997 is a `hidden beast` number, since 109 + 1 + 459 + 97 = 666.

It is not a de Polignac number, because 109145997 - 2³ = 109145989 is a prime.

It is a super-2 number, since 2×109145997² = 23825697322248018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109145987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52779 + ... + 54807.

Almost surely, 2^109145997 is an apocalyptic number.

It is an amenable number.

109145997 is a deficient number, since it is larger than the sum of its proper divisors (53416403).

109145997 is a wasteful number, since it uses less digits than its factorization.

109145997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 109145997 is about 10447.2961573797. The cubic root of 109145997 is about 477.8987971645.

The spelling of 109145997 in words is "one hundred nine million, one hundred forty-five thousand, nine hundred ninety-seven".