23095781 has 4 divisors (see below), whose sum is σ = 23223564. Its totient is φ = 22968000.

The previous prime is 23095777. The next prime is 23095783. The reversal of 23095781 is 18759032.

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 4990756 + 18105025 = 2234^2 + 4255^2 .

It is a cyclic number.

It is not a de Polignac number, because 23095781 - 2² = 23095777 is a prime.

It is a super-2 number, since 2×23095781² = 1066830199999922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23095783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63620 + ... + 63981.

It is an arithmetic number, because the mean of its divisors is an integer number (5805891).

Almost surely, 2^23095781 is an apocalyptic number.

It is an amenable number.

23095781 is a deficient number, since it is larger than the sum of its proper divisors (127783).

23095781 is a wasteful number, since it uses less digits than its factorization.

23095781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127782.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 23095781 is about 4805.8070081933. The cubic root of 23095781 is about 284.7809170937.

The spelling of 23095781 in words is "twenty-three million, ninety-five thousand, seven hundred eighty-one".