72843922 has 4 divisors (see below), whose sum is σ = 109265886. Its totient is φ = 36421960.

The previous prime is 72843913. The next prime is 72843931. The reversal of 72843922 is 22934827.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72843913) and next prime (72843931).

It can be written as a sum of positive squares in only one way, i.e., 41718681 + 31125241 = 6459^2 + 5579^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18210979 + ... + 18210982.

Almost surely, 2^72843922 is an apocalyptic number.

72843922 is a deficient number, since it is larger than the sum of its proper divisors (36421964).

72843922 is a wasteful number, since it uses less digits than its factorization.

72843922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36421963.

The product of its digits is 48384, while the sum is 37.

The square root of 72843922 is about 8534.8650838780. The cubic root of 72843922 is about 417.6358519018.

The spelling of 72843922 in words is "seventy-two million, eight hundred forty-three thousand, nine hundred twenty-two".