72973183 has 2 divisors, whose sum is σ = 72973184. Its totient is φ = 72973182.

The previous prime is 72973151. The next prime is 72973223. The reversal of 72973183 is 38137927.

It is an a-pointer prime, because the next prime (72973223) can be obtained adding 72973183 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (38137927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72973183 - 2⁵ = 72973151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72973283) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36486591 + 36486592.

It is an arithmetic number, because the mean of its divisors is an integer number (36486592).

Almost surely, 2^72973183 is an apocalyptic number.

72973183 is a deficient number, since it is larger than the sum of its proper divisors (1).

72973183 is an equidigital number, since it uses as much as digits as its factorization.

72973183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 72973183 is about 8542.4342549416. The cubic root of 72973183 is about 417.8827365029.

The spelling of 72973183 in words is "seventy-two million, nine hundred seventy-three thousand, one hundred eighty-three".