22729547 has 2 divisors, whose sum is σ = 22729548. Its totient is φ = 22729546.

The previous prime is 22729523. The next prime is 22729601. The reversal of 22729547 is 74592722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22729547 - 2²² = 18535243 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22729547.

It is not a weakly prime, because it can be changed into another prime (22722547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364773 + 11364774.

It is an arithmetic number, because the mean of its divisors is an integer number (11364774).

Almost surely, 2^22729547 is an apocalyptic number.

22729547 is a deficient number, since it is larger than the sum of its proper divisors (1).

22729547 is an equidigital number, since it uses as much as digits as its factorization.

22729547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 22729547 is about 4767.5514679970. The cubic root of 22729547 is about 283.2676155156.

The spelling of 22729547 in words is "twenty-two million, seven hundred twenty-nine thousand, five hundred forty-seven".