23534491 has 4 divisors (see below), whose sum is σ = 23978592. Its totient is φ = 23090392.

The previous prime is 23534473. The next prime is 23534501. The reversal of 23534491 is 19443532.

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-23534491 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23534411) 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, 221971 + ... + 222076.

It is an arithmetic number, because the mean of its divisors is an integer number (5994648).

Almost surely, 2^23534491 is an apocalyptic number.

23534491 is a deficient number, since it is larger than the sum of its proper divisors (444101).

23534491 is an equidigital number, since it uses as much as digits as its factorization.

23534491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444100.

The product of its digits is 12960, while the sum is 31.

The square root of 23534491 is about 4851.2360280654. The cubic root of 23534491 is about 286.5727799328.

It can be divided in two parts, 23534 and 491, that added together give a square (24025 = 155²).

The spelling of 23534491 in words is "twenty-three million, five hundred thirty-four thousand, four hundred ninety-one".