109597778 has 8 divisors (see below), whose sum is σ = 166091772. Its totient is φ = 54233856.

The previous prime is 109597771. The next prime is 109597781. The reversal of 109597778 is 877795901.

It can be written as a sum of positive squares in 2 ways, for example, as 104182849 + 5414929 = 10207^2 + 2327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (109597771) 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, 282275 + ... + 282662.

Almost surely, 2^109597778 is an apocalyptic number.

109597778 is a deficient number, since it is larger than the sum of its proper divisors (56493994).

109597778 is an equidigital number, since it uses as much as digits as its factorization.

109597778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565036.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The square root of 109597778 is about 10468.8957392841. The cubic root of 109597778 is about 478.5572680531.

The spelling of 109597778 in words is "one hundred nine million, five hundred ninety-seven thousand, seven hundred seventy-eight".