23353921 has 2 divisors, whose sum is σ = 23353922. Its totient is φ = 23353920.

The previous prime is 23353909. The next prime is 23353931. The reversal of 23353921 is 12935332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 505521 = 4780^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 23353921 - 2⁹ = 23353409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23353921.

It is not a weakly prime, because it can be changed into another prime (23353931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11676960 + 11676961.

It is an arithmetic number, because the mean of its divisors is an integer number (11676961).

Almost surely, 2^23353921 is an apocalyptic number.

It is an amenable number.

23353921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23353921 is an equidigital number, since it uses as much as digits as its factorization.

23353921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 28.

The square root of 23353921 is about 4832.5894714946. The cubic root of 23353921 is about 285.8379810000.

The spelling of 23353921 in words is "twenty-three million, three hundred fifty-three thousand, nine hundred twenty-one".