72493163 has 4 divisors (see below), whose sum is σ = 72529800. Its totient is φ = 72456528.

The previous prime is 72493153. The next prime is 72493177. The reversal of 72493163 is 36139427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36139427 = 673 ⋅53699.

It is a cyclic number.

It is not a de Polignac number, because 72493163 - 2⁴ = 72493147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72493103) 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 3 ways as a sum of consecutive naturals, for example, 15170 + ... + 19367.

It is an arithmetic number, because the mean of its divisors is an integer number (18132450).

Almost surely, 2^72493163 is an apocalyptic number.

72493163 is a deficient number, since it is larger than the sum of its proper divisors (36637).

72493163 is a wasteful number, since it uses less digits than its factorization.

72493163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36636.

The product of its digits is 27216, while the sum is 35.

The square root of 72493163 is about 8514.2916910334. The cubic root of 72493163 is about 416.9644378846.

The spelling of 72493163 in words is "seventy-two million, four hundred ninety-three thousand, one hundred sixty-three".