113978 has 4 divisors (see below), whose sum is σ = 170970. Its totient is φ = 56988.

The previous prime is 113969. The next prime is 113983. The reversal of 113978 is 879311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879311 = 103 ⋅8537.

It can be written as a sum of positive squares in only one way, i.e., 76729 + 37249 = 277^2 + 193^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 113978.

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, 28493 + ... + 28496.

2¹¹³⁹⁷⁸ is an apocalyptic number.

113978 is a deficient number, since it is larger than the sum of its proper divisors (56992).

113978 is an equidigital number, since it uses as much as digits as its factorization.

113978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56991.

The product of its digits is 1512, while the sum is 29.

The square root of 113978 is about 337.6062795625. The cubic root of 113978 is about 48.4849565417.

The spelling of 113978 in words is "one hundred thirteen thousand, nine hundred seventy-eight".