108690497 has 4 divisors (see below), whose sum is σ = 111628116. Its totient is φ = 105752880.

The previous prime is 108690487. The next prime is 108690509. The reversal of 108690497 is 794096801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794096801 = 349 ⋅2275349.

It can be written as a sum of positive squares in 2 ways, for example, as 102495376 + 6195121 = 10124^2 + 2489^2 .

It is a cyclic number.

It is not a de Polignac number, because 108690497 - 2²⁴ = 91913281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108690427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468754 + ... + 1468827.

It is an arithmetic number, because the mean of its divisors is an integer number (27907029).

Almost surely, 2^108690497 is an apocalyptic number.

It is an amenable number.

108690497 is a deficient number, since it is larger than the sum of its proper divisors (2937619).

108690497 is an equidigital number, since it uses as much as digits as its factorization.

108690497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937618.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 108690497 is about 10425.4734664666. The cubic root of 108690497 is about 477.2330637081.

The spelling of 108690497 in words is "one hundred eight million, six hundred ninety thousand, four hundred ninety-seven".