23240091 has 8 divisors (see below), whose sum is σ = 35413504. Its totient is φ = 13280040.

The previous prime is 23240039. The next prime is 23240101. The reversal of 23240091 is 19004232.

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

It is not a de Polignac number, because 23240091 - 2¹⁰ = 23239067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1106671 = 23240091 / (2 + 3 + 2 + 4 + 0 + 0 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (23240011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553315 + ... + 553356.

It is an arithmetic number, because the mean of its divisors is an integer number (4426688).

Almost surely, 2^23240091 is an apocalyptic number.

23240091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23240091 is a deficient number, since it is larger than the sum of its proper divisors (12173413).

23240091 is a wasteful number, since it uses less digits than its factorization.

23240091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106681.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23240091 is about 4820.7977555587. The cubic root of 23240091 is about 285.3728207947.

The spelling of 23240091 in words is "twenty-three million, two hundred forty thousand, ninety-one".