113782987 has 4 divisors (see below), whose sum is σ = 114271560. Its totient is φ = 113294416.

The previous prime is 113782973. The next prime is 113782993. The reversal of 113782987 is 789287311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789287311 = 31 ⋅25460881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113782987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113782087) 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, 243937 + ... + 244402.

It is an arithmetic number, because the mean of its divisors is an integer number (28567890).

Almost surely, 2^113782987 is an apocalyptic number.

113782987 is a deficient number, since it is larger than the sum of its proper divisors (488573).

113782987 is an equidigital number, since it uses as much as digits as its factorization.

113782987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488572.

The product of its digits is 169344, while the sum is 46.

The square root of 113782987 is about 10666.9108461635. The cubic root of 113782987 is about 484.5728864536.

It can be divided in two parts, 11378 and 2987, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 113782987 in words is "one hundred thirteen million, seven hundred eighty-two thousand, nine hundred eighty-seven".