72782533 has 4 divisors (see below), whose sum is σ = 73779628. Its totient is φ = 71785440.

The previous prime is 72782527. The next prime is 72782579. The reversal of 72782533 is 33528727.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36566209 + 36216324 = 6047^2 + 6018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72782533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72782492 and 72782501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72782233) 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, 498438 + ... + 498583.

It is an arithmetic number, because the mean of its divisors is an integer number (18444907).

Almost surely, 2^72782533 is an apocalyptic number.

72782533 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

72782533 is a deficient number, since it is larger than the sum of its proper divisors (997095).

72782533 is an equidigital number, since it uses as much as digits as its factorization.

72782533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997094.

The product of its digits is 70560, while the sum is 37.

The square root of 72782533 is about 8531.2679596881. The cubic root of 72782533 is about 417.5184984692.

The spelling of 72782533 in words is "seventy-two million, seven hundred eighty-two thousand, five hundred thirty-three".