23690813 has 2 divisors, whose sum is σ = 23690814. Its totient is φ = 23690812.

The previous prime is 23690803. The next prime is 23690831. The reversal of 23690813 is 31809632.

Together with next prime (23690831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21780889 + 1909924 = 4667^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 23690813 - 2¹² = 23686717 is a prime.

It is a super-2 number, since 2×23690813² = 1122509241201938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23690813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23690803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845406 + 11845407.

It is an arithmetic number, because the mean of its divisors is an integer number (11845407).

Almost surely, 2^23690813 is an apocalyptic number.

It is an amenable number.

23690813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23690813 is an equidigital number, since it uses as much as digits as its factorization.

23690813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 23690813 is about 4867.3209263413. The cubic root of 23690813 is about 287.2058763925.

The spelling of 23690813 in words is "twenty-three million, six hundred ninety thousand, eight hundred thirteen".