72642803 has 4 divisors (see below), whose sum is σ = 74606160. Its totient is φ = 70679448.

The previous prime is 72642797. The next prime is 72642821. The reversal of 72642803 is 30824627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30824627 = 1427 ⋅21601.

It is a cyclic number.

It is not a de Polignac number, because 72642803 - 2¹⁴ = 72626419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72642803.

It is not an unprimeable number, because it can be changed into a prime (72642863) 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, 981623 + ... + 981696.

It is an arithmetic number, because the mean of its divisors is an integer number (18651540).

Almost surely, 2^72642803 is an apocalyptic number.

72642803 is a deficient number, since it is larger than the sum of its proper divisors (1963357).

72642803 is a wasteful number, since it uses less digits than its factorization.

72642803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963356.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 72642803 is about 8523.0747386140. The cubic root of 72642803 is about 417.2511392946.

The spelling of 72642803 in words is "seventy-two million, six hundred forty-two thousand, eight hundred three".