72283947 has 4 divisors (see below), whose sum is σ = 96378600. Its totient is φ = 48189296.

The previous prime is 72283933. The next prime is 72283969. The reversal of 72283947 is 74938227.

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

It is a cyclic number.

It is not a de Polignac number, because 72283947 - 2⁷ = 72283819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72283899 and 72283908.

It is not an unprimeable number, because it can be changed into a prime (72283987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12047322 + ... + 12047327.

It is an arithmetic number, because the mean of its divisors is an integer number (24094650).

Almost surely, 2^72283947 is an apocalyptic number.

72283947 is a deficient number, since it is larger than the sum of its proper divisors (24094653).

72283947 is a wasteful number, since it uses less digits than its factorization.

72283947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24094652.

The product of its digits is 169344, while the sum is 42.

The square root of 72283947 is about 8501.9966478469. The cubic root of 72283947 is about 416.5629301929.

It can be divided in two parts, 7228 and 3947, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 72283947 in words is "seventy-two million, two hundred eighty-three thousand, nine hundred forty-seven".