72989273 has 6 divisors (see below), whose sum is σ = 84905946. Its totient is φ = 62562192.

The previous prime is 72989251. The next prime is 72989303. The reversal of 72989273 is 37298927.

It can be written as a sum of positive squares in only one way, i.e., 67190809 + 5798464 = 8197^2 + 2408^2 .

It is not a de Polignac number, because 72989273 - 2⁶ = 72989209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72989233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 744740 + ... + 744837.

It is an arithmetic number, because the mean of its divisors is an integer number (14150991).

Almost surely, 2^72989273 is an apocalyptic number.

It is an amenable number.

72989273 is a deficient number, since it is larger than the sum of its proper divisors (11916673).

72989273 is a wasteful number, since it uses less digits than its factorization.

72989273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489591 (or 1489584 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 72989273 is about 8543.3759720616. The cubic root of 72989273 is about 417.9134475068.

The spelling of 72989273 in words is "seventy-two million, nine hundred eighty-nine thousand, two hundred seventy-three".