23278317 has 4 divisors (see below), whose sum is σ = 31037760. Its totient is φ = 15518876.

The previous prime is 23278267. The next prime is 23278327. The reversal of 23278317 is 71387232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23278317 - 2¹⁸ = 23016173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278327) 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, 3879717 + ... + 3879722.

It is an arithmetic number, because the mean of its divisors is an integer number (7759440).

Almost surely, 2^23278317 is an apocalyptic number.

It is an amenable number.

23278317 is a deficient number, since it is larger than the sum of its proper divisors (7759443).

23278317 is an equidigital number, since it uses as much as digits as its factorization.

23278317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759442.

The product of its digits is 14112, while the sum is 33.

The square root of 23278317 is about 4824.7608230875. The cubic root of 23278317 is about 285.5291983514.

The spelling of 23278317 in words is "twenty-three million, two hundred seventy-eight thousand, three hundred seventeen".