72422689 has 2 divisors, whose sum is σ = 72422690. Its totient is φ = 72422688.

The previous prime is 72422681. The next prime is 72422719. The reversal of 72422689 is 98622427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41152225 + 31270464 = 6415^2 + 5592^2 .

It is a cyclic number.

It is not a de Polignac number, because 72422689 - 2³ = 72422681 is a prime.

It is not a weakly prime, because it can be changed into another prime (72422681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211344 + 36211345.

It is an arithmetic number, because the mean of its divisors is an integer number (36211345).

Almost surely, 2^72422689 is an apocalyptic number.

It is an amenable number.

72422689 is a deficient number, since it is larger than the sum of its proper divisors (1).

72422689 is an equidigital number, since it uses as much as digits as its factorization.

72422689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 72422689 is about 8510.1521137991. The cubic root of 72422689 is about 416.8292771883.

The spelling of 72422689 in words is "seventy-two million, four hundred twenty-two thousand, six hundred eighty-nine".