22013729 has 2 divisors, whose sum is σ = 22013730. Its totient is φ = 22013728.

The previous prime is 22013713. The next prime is 22013743. The reversal of 22013729 is 92731022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14615329 + 7398400 = 3823^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013729 - 2⁴ = 22013713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22013698 and 22013707.

It is not a weakly prime, because it can be changed into another prime (22013029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006864 + 11006865.

It is an arithmetic number, because the mean of its divisors is an integer number (11006865).

Almost surely, 2^22013729 is an apocalyptic number.

It is an amenable number.

22013729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22013729 is an equidigital number, since it uses as much as digits as its factorization.

22013729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22013729 is about 4691.8790478869. The cubic root of 22013729 is about 280.2622076088.

The spelling of 22013729 in words is "twenty-two million, thirteen thousand, seven hundred twenty-nine".