23287621 has 8 divisors (see below), whose sum is σ = 26669504. Its totient is φ = 19919520.

The previous prime is 23287619. The next prime is 23287681. The reversal of 23287621 is 12678232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23287621 - 2¹ = 23287619 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 (23287681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (3333688).

Almost surely, 2^23287621 is an apocalyptic number.

It is an amenable number.

23287621 is a deficient number, since it is larger than the sum of its proper divisors (3381883).

23287621 is an equidigital number, since it uses as much as digits as its factorization.

23287621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891.

The product of its digits is 8064, while the sum is 31.

The square root of 23287621 is about 4825.7249196364. The cubic root of 23287621 is about 285.5672338877.

The spelling of 23287621 in words is "twenty-three million, two hundred eighty-seven thousand, six hundred twenty-one".