72503073 has 16 divisors (see below), whose sum is σ = 108709440. Its totient is φ = 47751552.

The previous prime is 72503059. The next prime is 72503077. The reversal of 72503073 is 37030527.

It is not a de Polignac number, because 72503073 - 2⁶ = 72503009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72503077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13936 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (6794340).

Almost surely, 2^72503073 is an apocalyptic number.

It is an amenable number.

72503073 is a deficient number, since it is larger than the sum of its proper divisors (36206367).

72503073 is a wasteful number, since it uses less digits than its factorization.

72503073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32445 (or 32439 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 72503073 is about 8514.8736338245. The cubic root of 72503073 is about 416.9834370524.

The spelling of 72503073 in words is "seventy-two million, five hundred three thousand, seventy-three".