23778091 has 2 divisors, whose sum is σ = 23778092. Its totient is φ = 23778090.

The previous prime is 23778061. The next prime is 23778103. The reversal of 23778091 is 19087732.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23778091 - 2⁵ = 23778059 is a prime.

It is a super-2 number, since 2×23778091² = 1130795223208562, 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 23778091.

It is not a weakly prime, because it can be changed into another prime (23778061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889045 + 11889046.

It is an arithmetic number, because the mean of its divisors is an integer number (11889046).

Almost surely, 2^23778091 is an apocalyptic number.

23778091 is a deficient number, since it is larger than the sum of its proper divisors (1).

23778091 is an equidigital number, since it uses as much as digits as its factorization.

23778091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 23778091 is about 4876.2783964823. The cubic root of 23778091 is about 287.5581372032.

The spelling of 23778091 in words is "twenty-three million, seven hundred seventy-eight thousand, ninety-one".