73172489 has 16 divisors (see below), whose sum is σ = 81651024. Its totient is φ = 65145600.

The previous prime is 73172461. The next prime is 73172497. The reversal of 73172489 is 98427137.

It can be written as a sum of positive squares in 8 ways, for example, as 34633225 + 38539264 = 5885^2 + 6208^2 .

It is not a de Polignac number, because 73172489 - 2¹² = 73168393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73172089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41159 + ... + 42899.

It is an arithmetic number, because the mean of its divisors is an integer number (5103189).

Almost surely, 2^73172489 is an apocalyptic number.

It is an amenable number.

73172489 is a deficient number, since it is larger than the sum of its proper divisors (8478535).

73172489 is a wasteful number, since it uses less digits than its factorization.

73172489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868.

The product of its digits is 84672, while the sum is 41.

The square root of 73172489 is about 8554.0919447946. The cubic root of 73172489 is about 418.2628342476.

The spelling of 73172489 in words is "seventy-three million, one hundred seventy-two thousand, four hundred eighty-nine".