72418243 has 2 divisors, whose sum is σ = 72418244. Its totient is φ = 72418242.

The previous prime is 72418219. The next prime is 72418261. The reversal of 72418243 is 34281427.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72418243 is a prime.

It is equal to p_4251946 and since 72418243 and 4251946 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72418043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36209121 + 36209122.

It is an arithmetic number, because the mean of its divisors is an integer number (36209122).

Almost surely, 2^72418243 is an apocalyptic number.

72418243 is a deficient number, since it is larger than the sum of its proper divisors (1).

72418243 is an equidigital number, since it uses as much as digits as its factorization.

72418243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

The square root of 72418243 is about 8509.8908923675. The cubic root of 72418243 is about 416.8207473527.

The spelling of 72418243 in words is "seventy-two million, four hundred eighteen thousand, two hundred forty-three".