23722001 has 2 divisors, whose sum is σ = 23722002. Its totient is φ = 23722000.

The previous prime is 23721991. The next prime is 23722019. The reversal of 23722001 is 10022732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23049601 + 672400 = 4801^2 + 820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23722001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23722031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11861000 + 11861001.

It is an arithmetic number, because the mean of its divisors is an integer number (11861001).

Almost surely, 2^23722001 is an apocalyptic number.

It is an amenable number.

23722001 is a deficient number, since it is larger than the sum of its proper divisors (1).

23722001 is an equidigital number, since it uses as much as digits as its factorization.

23722001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 23722001 is about 4870.5236884754. The cubic root of 23722001 is about 287.3318527793.

Adding to 23722001 its reverse (10022732), we get a palindrome (33744733).

The spelling of 23722001 in words is "twenty-three million, seven hundred twenty-two thousand, one".