23721371 has 2 divisors, whose sum is σ = 23721372. Its totient is φ = 23721370.

The previous prime is 23721359. The next prime is 23721377. The reversal of 23721371 is 17312732.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23721371 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23721371.

It is not a weakly prime, because it can be changed into another prime (23721377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860685 + 11860686.

It is an arithmetic number, because the mean of its divisors is an integer number (11860686).

Almost surely, 2^23721371 is an apocalyptic number.

23721371 is a deficient number, since it is larger than the sum of its proper divisors (1).

23721371 is an equidigital number, since it uses as much as digits as its factorization.

23721371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 26.

The square root of 23721371 is about 4870.4590132759. The cubic root of 23721371 is about 287.3293091396.

The spelling of 23721371 in words is "twenty-three million, seven hundred twenty-one thousand, three hundred seventy-one".