72782563 has 4 divisors (see below), whose sum is σ = 83180080. Its totient is φ = 62385048.

The previous prime is 72782527. The next prime is 72782579. The reversal of 72782563 is 36528727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36528727 = 1931 ⋅18917.

It is a cyclic number.

It is not a de Polignac number, because 72782563 - 2¹³ = 72774371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72782063) 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, 5198748 + ... + 5198761.

It is an arithmetic number, because the mean of its divisors is an integer number (20795020).

Almost surely, 2^72782563 is an apocalyptic number.

72782563 is a deficient number, since it is larger than the sum of its proper divisors (10397517).

72782563 is a wasteful number, since it uses less digits than its factorization.

72782563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10397516.

The product of its digits is 141120, while the sum is 40.

The square root of 72782563 is about 8531.2697179259. The cubic root of 72782563 is about 417.5185558344.

The spelling of 72782563 in words is "seventy-two million, seven hundred eighty-two thousand, five hundred sixty-three".