72473663 has 2 divisors, whose sum is σ = 72473664. Its totient is φ = 72473662.

The previous prime is 72473603. The next prime is 72473683. The reversal of 72473663 is 36637427.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36637427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72473663 - 2¹⁰ = 72472639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72473603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36236831 + 36236832.

It is an arithmetic number, because the mean of its divisors is an integer number (36236832).

Almost surely, 2^72473663 is an apocalyptic number.

72473663 is a deficient number, since it is larger than the sum of its proper divisors (1).

72473663 is an equidigital number, since it uses as much as digits as its factorization.

72473663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 38.

The square root of 72473663 is about 8513.1464805911. The cubic root of 72473663 is about 416.9270479876.

The spelling of 72473663 in words is "seventy-two million, four hundred seventy-three thousand, six hundred sixty-three".