72823489 has 4 divisors (see below), whose sum is σ = 72841156. Its totient is φ = 72805824.

The previous prime is 72823483. The next prime is 72823501. The reversal of 72823489 is 98432827.

It is a happy number.

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 8294400 + 64529089 = 2880^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 72823489 - 2¹⁵ = 72790721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72823483) 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, 997 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (18210289).

Almost surely, 2^72823489 is an apocalyptic number.

It is an amenable number.

72823489 is a deficient number, since it is larger than the sum of its proper divisors (17667).

72823489 is a wasteful number, since it uses less digits than its factorization.

72823489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17666.

The product of its digits is 193536, while the sum is 43.

The square root of 72823489 is about 8533.6679686990. The cubic root of 72823489 is about 417.5967987630.

Adding to 72823489 its product of digits (193536), we get a square (73017025 = 8545²).

The spelling of 72823489 in words is "seventy-two million, eight hundred twenty-three thousand, four hundred eighty-nine".