23427391 has 4 divisors (see below), whose sum is σ = 25229512. Its totient is φ = 21625272.

The previous prime is 23427347. The next prime is 23427403. The reversal of 23427391 is 19372432.

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

It is a cyclic number.

It is not a de Polignac number, because 23427391 - 2¹¹ = 23425343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23427091) 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, 901041 + ... + 901066.

It is an arithmetic number, because the mean of its divisors is an integer number (6307378).

Almost surely, 2^23427391 is an apocalyptic number.

23427391 is a deficient number, since it is larger than the sum of its proper divisors (1802121).

23427391 is a wasteful number, since it uses less digits than its factorization.

23427391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802120.

The product of its digits is 9072, while the sum is 31.

The square root of 23427391 is about 4840.1850171249. The cubic root of 23427391 is about 286.1374101302.

The spelling of 23427391 in words is "twenty-three million, four hundred twenty-seven thousand, three hundred ninety-one".