23293987 has 4 divisors (see below), whose sum is σ = 23309440. Its totient is φ = 23278536.

The previous prime is 23293969. The next prime is 23294017. The reversal of 23293987 is 78939232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23293987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23293937) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5187 + ... + 8572.

It is an arithmetic number, because the mean of its divisors is an integer number (5827360).

Almost surely, 2^23293987 is an apocalyptic number.

23293987 is a deficient number, since it is larger than the sum of its proper divisors (15453).

23293987 is a wasteful number, since it uses less digits than its factorization.

23293987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15452.

The product of its digits is 163296, while the sum is 43.

The square root of 23293987 is about 4826.3844645863. The cubic root of 23293987 is about 285.5932527954.

The spelling of 23293987 in words is "twenty-three million, two hundred ninety-three thousand, nine hundred eighty-seven".