109354978 has 4 divisors (see below), whose sum is σ = 164032470. Its totient is φ = 54677488.

The previous prime is 109354967. The next prime is 109354979. The reversal of 109354978 is 879453901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879453901 = 197 ⋅4464233.

It can be written as a sum of positive squares in only one way, i.e., 87104889 + 22250089 = 9333^2 + 4717^2 .

It is a super-2 number, since 2×109354978² = 23917022426760968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109354979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27338743 + ... + 27338746.

Almost surely, 2^109354978 is an apocalyptic number.

109354978 is a deficient number, since it is larger than the sum of its proper divisors (54677492).

109354978 is an equidigital number, since it uses as much as digits as its factorization.

109354978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54677491.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 109354978 is about 10457.2930531759. The cubic root of 109354978 is about 478.2036124204.

The spelling of 109354978 in words is "one hundred nine million, three hundred fifty-four thousand, nine hundred seventy-eight".