72743851 has 2 divisors, whose sum is σ = 72743852. Its totient is φ = 72743850.

The previous prime is 72743821. The next prime is 72743857. The reversal of 72743851 is 15834727.

It is a strong prime.

It is an emirp because it is prime and its reverse (15834727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72743851 - 2⁵ = 72743819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72743851.

It is not a weakly prime, because it can be changed into another prime (72743857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36371925 + 36371926.

It is an arithmetic number, because the mean of its divisors is an integer number (36371926).

Almost surely, 2^72743851 is an apocalyptic number.

72743851 is a deficient number, since it is larger than the sum of its proper divisors (1).

72743851 is an equidigital number, since it uses as much as digits as its factorization.

72743851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 72743851 is about 8529.0005862352. Note that the first 3 decimals coincide. The cubic root of 72743851 is about 417.4445186652. Note that the first 3 decimals are identical.

The spelling of 72743851 in words is "seventy-two million, seven hundred forty-three thousand, eight hundred fifty-one".