72323194 has 4 divisors (see below), whose sum is σ = 108484794. Its totient is φ = 36161596.

The previous prime is 72323179. The next prime is 72323213. The reversal of 72323194 is 49132327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49132327 = 617 ⋅79631.

It can be written as a sum of positive squares in only one way, i.e., 58905625 + 13417569 = 7675^2 + 3663^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18080797 + ... + 18080800.

Almost surely, 2^72323194 is an apocalyptic number.

72323194 is a deficient number, since it is larger than the sum of its proper divisors (36161600).

72323194 is a wasteful number, since it uses less digits than its factorization.

72323194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36161599.

The product of its digits is 9072, while the sum is 31.

The square root of 72323194 is about 8504.3044395177. The cubic root of 72323194 is about 416.6383083278.

The spelling of 72323194 in words is "seventy-two million, three hundred twenty-three thousand, one hundred ninety-four".