23742517 has 2 divisors, whose sum is σ = 23742518. Its totient is φ = 23742516.

The previous prime is 23742487. The next prime is 23742527. The reversal of 23742517 is 71524732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23726641 + 15876 = 4871^2 + 126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23742517 is a prime.

It is a super-2 number, since 2×23742517² = 1127414226990578, which contains 22 as substring.

It is equal to p_1491970 and since 23742517 and 1491970 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23742527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11871258 + 11871259.

It is an arithmetic number, because the mean of its divisors is an integer number (11871259).

Almost surely, 2^23742517 is an apocalyptic number.

It is an amenable number.

23742517 is a deficient number, since it is larger than the sum of its proper divisors (1).

23742517 is an equidigital number, since it uses as much as digits as its factorization.

23742517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 23742517 is about 4872.6293723205. The cubic root of 23742517 is about 287.4146620064.

The spelling of 23742517 in words is "twenty-three million, seven hundred forty-two thousand, five hundred seventeen".