72422069 has 4 divisors (see below), whose sum is σ = 72439596. Its totient is φ = 72404544.

The previous prime is 72422017. The next prime is 72422089. The reversal of 72422069 is 96022427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 55323844 = 4135^2 + 7438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72422069 is a prime.

It is a super-2 number, since 2×72422069² = 10489912156481522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72422089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247 + ... + 12099.

It is an arithmetic number, because the mean of its divisors is an integer number (18109899).

Almost surely, 2^72422069 is an apocalyptic number.

It is an amenable number.

72422069 is a deficient number, since it is larger than the sum of its proper divisors (17527).

72422069 is a wasteful number, since it uses less digits than its factorization.

72422069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17526.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 72422069 is about 8510.1156866402. The cubic root of 72422069 is about 416.8280877135.

The spelling of 72422069 in words is "seventy-two million, four hundred twenty-two thousand, sixty-nine".