72443194 has 4 divisors (see below), whose sum is σ = 108664794. Its totient is φ = 36221596.

The previous prime is 72443179. The next prime is 72443201. The reversal of 72443194 is 49134427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49134427 = 313 ⋅156979.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 5121169 = 8205^2 + 2263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18110797 + ... + 18110800.

Almost surely, 2^72443194 is an apocalyptic number.

72443194 is a deficient number, since it is larger than the sum of its proper divisors (36221600).

72443194 is a wasteful number, since it uses less digits than its factorization.

72443194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36221599.

The product of its digits is 24192, while the sum is 34.

The square root of 72443194 is about 8511.3567661096. The cubic root of 72443194 is about 416.8686123650.

The spelling of 72443194 in words is "seventy-two million, four hundred forty-three thousand, one hundred ninety-four".