72076489 has 4 divisors (see below), whose sum is σ = 72141460. Its totient is φ = 72011520.

The previous prime is 72076409. The next prime is 72076493. The reversal of 72076489 is 98467027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98467027 = 37 ⋅2661271.

It can be written as a sum of positive squares in 2 ways, for example, as 24010000 + 48066489 = 4900^2 + 6933^2 .

It is a cyclic number.

It is not a de Polignac number, because 72076489 - 2¹⁷ = 71945417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72076409) 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, 30792 + ... + 33049.

It is an arithmetic number, because the mean of its divisors is an integer number (18035365).

Almost surely, 2^72076489 is an apocalyptic number.

It is an amenable number.

72076489 is a deficient number, since it is larger than the sum of its proper divisors (64971).

72076489 is a wasteful number, since it uses less digits than its factorization.

72076489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64970.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 72076489 is about 8489.7873353813. The cubic root of 72076489 is about 416.1640305583.

The spelling of 72076489 in words is "seventy-two million, seventy-six thousand, four hundred eighty-nine".