72283361 has 4 divisors (see below), whose sum is σ = 73647252. Its totient is φ = 70919472.

The previous prime is 72283349. The next prime is 72283363. The reversal of 72283361 is 16338227.

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: 16338227 = 79 ⋅206813.

It can be written as a sum of positive squares in 2 ways, for example, as 49434961 + 22848400 = 7031^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 72283361 - 2¹⁴ = 72266977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72283363) 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, 681866 + ... + 681971.

It is an arithmetic number, because the mean of its divisors is an integer number (18411813).

Almost surely, 2^72283361 is an apocalyptic number.

It is an amenable number.

72283361 is a deficient number, since it is larger than the sum of its proper divisors (1363891).

72283361 is a wasteful number, since it uses less digits than its factorization.

72283361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363890.

The product of its digits is 12096, while the sum is 32.

The square root of 72283361 is about 8501.9621852841. The cubic root of 72283361 is about 416.5618045094.

The spelling of 72283361 in words is "seventy-two million, two hundred eighty-three thousand, three hundred sixty-one".