23490091 has 2 divisors, whose sum is σ = 23490092. Its totient is φ = 23490090.

The previous prime is 23490067. The next prime is 23490109. The reversal of 23490091 is 19009432.

It is a happy number.

Together with next prime (23490109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23490091 - 2⁵ = 23490059 is a prime.

It is equal to p_1477144 and since 23490091 and 1477144 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23490001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11745045 + 11745046.

It is an arithmetic number, because the mean of its divisors is an integer number (11745046).

Almost surely, 2^23490091 is an apocalyptic number.

23490091 is a deficient number, since it is larger than the sum of its proper divisors (1).

23490091 is an equidigital number, since it uses as much as digits as its factorization.

23490091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 23490091 is about 4846.6577143429. The cubic root of 23490091 is about 286.3924511069.

The spelling of 23490091 in words is "twenty-three million, four hundred ninety thousand, ninety-one".