23739997 has 2 divisors, whose sum is σ = 23739998. Its totient is φ = 23739996.

The previous prime is 23739971. The next prime is 23740001. The reversal of 23739997 is 79993732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13461561 + 10278436 = 3669^2 + 3206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23739997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23739997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23739907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11869998 + 11869999.

It is an arithmetic number, because the mean of its divisors is an integer number (11869999).

Almost surely, 2^23739997 is an apocalyptic number.

It is an amenable number.

23739997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23739997 is an equidigital number, since it uses as much as digits as its factorization.

23739997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 642978, while the sum is 49.

The square root of 23739997 is about 4872.3707781736. The cubic root of 23739997 is about 287.4044930400.

The spelling of 23739997 in words is "twenty-three million, seven hundred thirty-nine thousand, nine hundred ninety-seven".