118403887 has 4 divisors (see below), whose sum is σ = 135318736. Its totient is φ = 101489040.

The previous prime is 118403869. The next prime is 118403903. The reversal of 118403887 is 788304811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788304811 = 7 ⋅112614973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118403887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118403587) 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, 8457414 + ... + 8457427.

It is an arithmetic number, because the mean of its divisors is an integer number (33829684).

Almost surely, 2^118403887 is an apocalyptic number.

118403887 is a deficient number, since it is larger than the sum of its proper divisors (16914849).

118403887 is an equidigital number, since it uses as much as digits as its factorization.

118403887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16914848.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 118403887 is about 10881.3550167247. The cubic root of 118403887 is about 491.0457839374.

The spelling of 118403887 in words is "one hundred eighteen million, four hundred three thousand, eight hundred eighty-seven".