72233669 has 4 divisors (see below), whose sum is σ = 72978444. Its totient is φ = 71488896.

The previous prime is 72233653. The next prime is 72233683. The reversal of 72233669 is 96633227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96633227 = 4903 ⋅19709.

It can be written as a sum of positive squares in 2 ways, for example, as 34656769 + 37576900 = 5887^2 + 6130^2 .

It is a cyclic number.

It is not a de Polignac number, because 72233669 - 2⁴ = 72233653 is a prime.

It is a super-2 number, since 2×72233669² = 10435405874403122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72233569) 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, 372242 + ... + 372435.

It is an arithmetic number, because the mean of its divisors is an integer number (18244611).

Almost surely, 2^72233669 is an apocalyptic number.

It is an amenable number.

72233669 is a deficient number, since it is larger than the sum of its proper divisors (744775).

72233669 is an equidigital number, since it uses as much as digits as its factorization.

72233669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744774.

The product of its digits is 81648, while the sum is 38.

The square root of 72233669 is about 8499.0392986502. The cubic root of 72233669 is about 416.4663259458.

The spelling of 72233669 in words is "seventy-two million, two hundred thirty-three thousand, six hundred sixty-nine".