72603473 has 2 divisors, whose sum is σ = 72603474. Its totient is φ = 72603472.

The previous prime is 72603469. The next prime is 72603521. The reversal of 72603473 is 37430627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67436944 + 5166529 = 8212^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 72603473 - 2² = 72603469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72603403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36301736 + 36301737.

It is an arithmetic number, because the mean of its divisors is an integer number (36301737).

Almost surely, 2^72603473 is an apocalyptic number.

It is an amenable number.

72603473 is a deficient number, since it is larger than the sum of its proper divisors (1).

72603473 is an equidigital number, since it uses as much as digits as its factorization.

72603473 is an evil number, because the sum of its binary digits is even.

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

The square root of 72603473 is about 8520.7671602972. The cubic root of 72603473 is about 417.1758235067.

The spelling of 72603473 in words is "seventy-two million, six hundred three thousand, four hundred seventy-three".