23311091 has 2 divisors, whose sum is σ = 23311092. Its totient is φ = 23311090.

The previous prime is 23311087. The next prime is 23311111. The reversal of 23311091 is 19011332.

It is an a-pointer prime, because the next prime (23311111) can be obtained adding 23311091 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23311091 - 2² = 23311087 is a prime.

It is a super-2 number, since 2×23311091² = 1086813927220562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23311021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655545 + 11655546.

It is an arithmetic number, because the mean of its divisors is an integer number (11655546).

Almost surely, 2^23311091 is an apocalyptic number.

23311091 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311091 is an equidigital number, since it uses as much as digits as its factorization.

23311091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 23311091 is about 4828.1560662431. The cubic root of 23311091 is about 285.6631362365.

The spelling of 23311091 in words is "twenty-three million, three hundred eleven thousand, ninety-one".