72743722 has 4 divisors (see below), whose sum is σ = 109115586. Its totient is φ = 36371860.

The previous prime is 72743707. The next prime is 72743729. The reversal of 72743722 is 22734727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22734727 = 2281 ⋅9967.

It can be written as a sum of positive squares in only one way, i.e., 68211081 + 4532641 = 8259^2 + 2129^2 .

It is not an unprimeable number, because it can be changed into a prime (72743729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18185929 + ... + 18185932.

Almost surely, 2^72743722 is an apocalyptic number.

72743722 is a deficient number, since it is larger than the sum of its proper divisors (36371864).

72743722 is a wasteful number, since it uses less digits than its factorization.

72743722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36371863.

The product of its digits is 32928, while the sum is 34.

The square root of 72743722 is about 8528.9930237983. The cubic root of 72743722 is about 417.4442719072. Note that the first 3 decimals are identical.

The spelling of 72743722 in words is "seventy-two million, seven hundred forty-three thousand, seven hundred twenty-two".