113421987 has 24 divisors (see below), whose sum is σ = 193695840. Its totient is φ = 62576640.

The previous prime is 113421953. The next prime is 113422007. The reversal of 113421987 is 789124311.

It is a happy number.

It is not a de Polignac number, because 113421987 - 2⁶ = 113421923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113421937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29214 + ... + 32867.

It is an arithmetic number, because the mean of its divisors is an integer number (8070660).

Almost surely, 2^113421987 is an apocalyptic number.

113421987 is a deficient number, since it is larger than the sum of its proper divisors (80273853).

113421987 is a wasteful number, since it uses less digits than its factorization.

113421987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62123 (or 62120 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 113421987 is about 10649.9759154657. The cubic root of 113421987 is about 484.0598743745.

The spelling of 113421987 in words is "one hundred thirteen million, four hundred twenty-one thousand, nine hundred eighty-seven".