23061491 has 2 divisors, whose sum is σ = 23061492. Its totient is φ = 23061490.

The previous prime is 23061487. The next prime is 23061509. The reversal of 23061491 is 19416032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23061491 - 2² = 23061487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23061491.

It is not a weakly prime, because it can be changed into another prime (23061481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11530745 + 11530746.

It is an arithmetic number, because the mean of its divisors is an integer number (11530746).

Almost surely, 2^23061491 is an apocalyptic number.

23061491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23061491 is an equidigital number, since it uses as much as digits as its factorization.

23061491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 23061491 is about 4802.2381240417. The cubic root of 23061491 is about 284.6399104691.

The spelling of 23061491 in words is "twenty-three million, sixty-one thousand, four hundred ninety-one".