23278811 has 2 divisors, whose sum is σ = 23278812. Its totient is φ = 23278810.

The previous prime is 23278807. The next prime is 23278817. The reversal of 23278811 is 11887232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23278811 - 2² = 23278807 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23278817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11639405 + 11639406.

It is an arithmetic number, because the mean of its divisors is an integer number (11639406).

Almost surely, 2^23278811 is an apocalyptic number.

23278811 is a deficient number, since it is larger than the sum of its proper divisors (1).

23278811 is an equidigital number, since it uses as much as digits as its factorization.

23278811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 23278811 is about 4824.8120170635. The cubic root of 23278811 is about 285.5312181198.

The spelling of 23278811 in words is "twenty-three million, two hundred seventy-eight thousand, eight hundred eleven".