23115977 has 4 divisors (see below), whose sum is σ = 23202180. Its totient is φ = 23029776.

The previous prime is 23115949. The next prime is 23115991. The reversal of 23115977 is 77951132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7203856 + 15912121 = 2684^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23115977 - 2⁸ = 23115721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23115907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42698 + ... + 43235.

It is an arithmetic number, because the mean of its divisors is an integer number (5800545).

Almost surely, 2^23115977 is an apocalyptic number.

It is an amenable number.

23115977 is a deficient number, since it is larger than the sum of its proper divisors (86203).

23115977 is an equidigital number, since it uses as much as digits as its factorization.

23115977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86202.

The product of its digits is 13230, while the sum is 35.

The square root of 23115977 is about 4807.9077570186. The cubic root of 23115977 is about 284.8639013666.

The spelling of 23115977 in words is "twenty-three million, one hundred fifteen thousand, nine hundred seventy-seven".