72023969 has 4 divisors (see below), whose sum is σ = 72059460. Its totient is φ = 71988480.

The previous prime is 72023957. The next prime is 72023983. The reversal of 72023969 is 96932027.

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 47886400 + 24137569 = 6920^2 + 4913^2 .

It is a cyclic number.

It is not a de Polignac number, because 72023969 - 2¹² = 72019873 is a prime.

It is a super-2 number, since 2×72023969² = 10374904221025922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72023909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14504 + ... + 18825.

It is an arithmetic number, because the mean of its divisors is an integer number (18014865).

Almost surely, 2^72023969 is an apocalyptic number.

It is an amenable number.

72023969 is a deficient number, since it is larger than the sum of its proper divisors (35491).

72023969 is a wasteful number, since it uses less digits than its factorization.

72023969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35490.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 72023969 is about 8486.6936435811. The cubic root of 72023969 is about 416.0629238674.

The spelling of 72023969 in words is "seventy-two million, twenty-three thousand, nine hundred sixty-nine".