23135399 has 6 divisors (see below), whose sum is σ = 26912664. Its totient is φ = 19830300.

The previous prime is 23135389. The next prime is 23135443. The reversal of 23135399 is 99353132.

It is a happy number.

It is not a de Polignac number, because 23135399 - 2⁴ = 23135383 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 (23135339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236027 + ... + 236124.

It is an arithmetic number, because the mean of its divisors is an integer number (4485444).

Almost surely, 2^23135399 is an apocalyptic number.

23135399 is a deficient number, since it is larger than the sum of its proper divisors (3777265).

23135399 is an equidigital number, since it uses as much as digits as its factorization.

23135399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472165 (or 472158 counting only the distinct ones).

The product of its digits is 21870, while the sum is 35.

The square root of 23135399 is about 4809.9271304252. The cubic root of 23135399 is about 284.9436597362.

The spelling of 23135399 in words is "twenty-three million, one hundred thirty-five thousand, three hundred ninety-nine".