72283297 has 4 divisors (see below), whose sum is σ = 72477460. Its totient is φ = 72089136.

The previous prime is 72283261. The next prime is 72283313. The reversal of 72283297 is 79238227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79238227 = 19 ⋅4170433.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 52649536 = 4431^2 + 7256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72283297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72280297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96522 + ... + 97267.

It is an arithmetic number, because the mean of its divisors is an integer number (18119365).

Almost surely, 2^72283297 is an apocalyptic number.

It is an amenable number.

72283297 is a deficient number, since it is larger than the sum of its proper divisors (194163).

72283297 is a wasteful number, since it uses less digits than its factorization.

72283297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194162.

The product of its digits is 84672, while the sum is 40.

The square root of 72283297 is about 8501.9584214462. The cubic root of 72283297 is about 416.5616815675.

The spelling of 72283297 in words is "seventy-two million, two hundred eighty-three thousand, two hundred ninety-seven".