23680729 has 2 divisors, whose sum is σ = 23680730. Its totient is φ = 23680728.

The previous prime is 23680721. The next prime is 23680819. The reversal of 23680729 is 92708632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15586704 + 8094025 = 3948^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 23680729 - 2³ = 23680721 is a prime.

It is not a weakly prime, because it can be changed into another prime (23680721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11840364 + 11840365.

It is an arithmetic number, because the mean of its divisors is an integer number (11840365).

Almost surely, 2^23680729 is an apocalyptic number.

It is an amenable number.

23680729 is a deficient number, since it is larger than the sum of its proper divisors (1).

23680729 is an equidigital number, since it uses as much as digits as its factorization.

23680729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 23680729 is about 4866.2849279507. The cubic root of 23680729 is about 287.1651208603.

The spelling of 23680729 in words is "twenty-three million, six hundred eighty thousand, seven hundred twenty-nine".