23782729 has 2 divisors, whose sum is σ = 23782730. Its totient is φ = 23782728.

The previous prime is 23782691. The next prime is 23782739. The reversal of 23782729 is 92728732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13155129 + 10627600 = 3627^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 23782729 - 2⁹ = 23782217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23782691 and 23782700.

It is not a weakly prime, because it can be changed into another prime (23782739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11891364 + 11891365.

It is an arithmetic number, because the mean of its divisors is an integer number (11891365).

Almost surely, 2^23782729 is an apocalyptic number.

It is an amenable number.

23782729 is a deficient number, since it is larger than the sum of its proper divisors (1).

23782729 is an equidigital number, since it uses as much as digits as its factorization.

23782729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 23782729 is about 4876.7539408914. The cubic root of 23782729 is about 287.5768323953.

The spelling of 23782729 in words is "twenty-three million, seven hundred eighty-two thousand, seven hundred twenty-nine".