72812903 has 4 divisors (see below), whose sum is σ = 74047080. Its totient is φ = 71578728.

The previous prime is 72812899. The next prime is 72812911. The reversal of 72812903 is 30921827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30921827 = 17 ⋅1818931.

It is a cyclic number.

It is not a de Polignac number, because 72812903 - 2² = 72812899 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 72812903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72812923) 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, 617000 + ... + 617117.

It is an arithmetic number, because the mean of its divisors is an integer number (18511770).

Almost surely, 2^72812903 is an apocalyptic number.

72812903 is a deficient number, since it is larger than the sum of its proper divisors (1234177).

72812903 is a wasteful number, since it uses less digits than its factorization.

72812903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234176.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 72812903 is about 8533.0476970424. The cubic root of 72812903 is about 417.5765631038.

It can be divided in two parts, 728 and 12903, that added together give a palindrome (13631).

The spelling of 72812903 in words is "seventy-two million, eight hundred twelve thousand, nine hundred three".