23976409 has 4 divisors (see below), whose sum is σ = 25386804. Its totient is φ = 22566016.

The previous prime is 23976401. The next prime is 23976427. The reversal of 23976409 is 90467932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 16024009 = 2820^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 23976409 - 2³ = 23976401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23976401) 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, 705172 + ... + 705205.

It is an arithmetic number, because the mean of its divisors is an integer number (6346701).

Almost surely, 2^23976409 is an apocalyptic number.

It is an amenable number.

23976409 is a deficient number, since it is larger than the sum of its proper divisors (1410395).

23976409 is a wasteful number, since it uses less digits than its factorization.

23976409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410394.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 23976409 is about 4896.5711472417. The cubic root of 23976409 is about 288.3553716620.

The spelling of 23976409 in words is "twenty-three million, nine hundred seventy-six thousand, four hundred nine".