111878434 has 4 divisors (see below), whose sum is σ = 167817654. Its totient is φ = 55939216.

The previous prime is 111878423. The next prime is 111878449. The reversal of 111878434 is 434878111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434878111 = 3461 ⋅125651.

It can be written as a sum of positive squares in only one way, i.e., 107060409 + 4818025 = 10347^2 + 2195^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111878393 and 111878402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27969607 + ... + 27969610.

Almost surely, 2^111878434 is an apocalyptic number.

111878434 is a deficient number, since it is larger than the sum of its proper divisors (55939220).

111878434 is an equidigital number, since it uses as much as digits as its factorization.

111878434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55939219.

The product of its digits is 21504, while the sum is 37.

The square root of 111878434 is about 10577.2602312697. The cubic root of 111878434 is about 481.8539900828.

The spelling of 111878434 in words is "one hundred eleven million, eight hundred seventy-eight thousand, four hundred thirty-four".