73172491 has 8 divisors (see below), whose sum is σ = 83685344. Its totient is φ = 62674560.

The previous prime is 73172461. The next prime is 73172497. The reversal of 73172491 is 19427137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73172491 - 2⁹ = 73171979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73172497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10321 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (10460668).

Almost surely, 2^73172491 is an apocalyptic number.

73172491 is a deficient number, since it is larger than the sum of its proper divisors (10512853).

73172491 is a wasteful number, since it uses less digits than its factorization.

73172491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461.

The product of its digits is 10584, while the sum is 34.

The square root of 73172491 is about 8554.0920616977. The cubic root of 73172491 is about 418.2628380583.

The spelling of 73172491 in words is "seventy-three million, one hundred seventy-two thousand, four hundred ninety-one".