72943469 has 4 divisors (see below), whose sum is σ = 74722620. Its totient is φ = 71164320.

The previous prime is 72943457. The next prime is 72943487. The reversal of 72943469 is 96434927.

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 6325225 + 66618244 = 2515^2 + 8162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72943469 is a prime.

It is a super-2 number, since 2×72943469² = 10641499339507922, 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 (72943669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889514 + ... + 889595.

It is an arithmetic number, because the mean of its divisors is an integer number (18680655).

Almost surely, 2^72943469 is an apocalyptic number.

It is an amenable number.

72943469 is a deficient number, since it is larger than the sum of its proper divisors (1779151).

72943469 is a wasteful number, since it uses less digits than its factorization.

72943469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779150.

The product of its digits is 326592, while the sum is 44.

The square root of 72943469 is about 8540.6948780530. The cubic root of 72943469 is about 417.8260094841.

The spelling of 72943469 in words is "seventy-two million, nine hundred forty-three thousand, four hundred sixty-nine".