72673403 has 4 divisors (see below), whose sum is σ = 79280088. Its totient is φ = 66066720.

The previous prime is 72673373. The next prime is 72673417. The reversal of 72673403 is 30437627.

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

It is a cyclic number.

It is not a de Polignac number, because 72673403 - 2⁶ = 72673339 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 72673403.

It is not an unprimeable number, because it can be changed into a prime (72673303) 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, 3303326 + ... + 3303347.

It is an arithmetic number, because the mean of its divisors is an integer number (19820022).

Almost surely, 2^72673403 is an apocalyptic number.

72673403 is a deficient number, since it is larger than the sum of its proper divisors (6606685).

72673403 is a wasteful number, since it uses less digits than its factorization.

72673403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606684.

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 72673403 is about 8524.8696764232. The cubic root of 72673403 is about 417.3097185894.

The spelling of 72673403 in words is "seventy-two million, six hundred seventy-three thousand, four hundred three".