23777813 has 2 divisors, whose sum is σ = 23777814. Its totient is φ = 23777812.

The previous prime is 23777731. The next prime is 23777843. The reversal of 23777813 is 31877732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23746129 + 31684 = 4873^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 23777813 - 2¹⁴ = 23761429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23777843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11888906 + 11888907.

It is an arithmetic number, because the mean of its divisors is an integer number (11888907).

Almost surely, 2^23777813 is an apocalyptic number.

It is an amenable number.

23777813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23777813 is an equidigital number, since it uses as much as digits as its factorization.

23777813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 23777813 is about 4876.2498910536. The cubic root of 23777813 is about 287.5570165431.

The spelling of 23777813 in words is "twenty-three million, seven hundred seventy-seven thousand, eight hundred thirteen".