72442873 has 2 divisors, whose sum is σ = 72442874. Its totient is φ = 72442872.

The previous prime is 72442871. The next prime is 72442883. The reversal of 72442873 is 37824427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37491129 + 34951744 = 6123^2 + 5912^2 .

It is a cyclic number.

It is not a de Polignac number, because 72442873 - 2¹ = 72442871 is a prime.

Together with 72442871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72442871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36221436 + 36221437.

It is an arithmetic number, because the mean of its divisors is an integer number (36221437).

Almost surely, 2^72442873 is an apocalyptic number.

It is an amenable number.

72442873 is a deficient number, since it is larger than the sum of its proper divisors (1).

72442873 is an equidigital number, since it uses as much as digits as its factorization.

72442873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 37.

The square root of 72442873 is about 8511.3379089307. The cubic root of 72442873 is about 416.8679966411.

The spelling of 72442873 in words is "seventy-two million, four hundred forty-two thousand, eight hundred seventy-three".