72428159 has 2 divisors, whose sum is σ = 72428160. Its totient is φ = 72428158.

The previous prime is 72428149. The next prime is 72428221. The reversal of 72428159 is 95182427.

It is a weak prime.

It is an emirp because it is prime and its reverse (95182427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72428159 is a prime.

It is a super-2 number, since 2×72428159² = 10491676432258562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72428149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36214079 + 36214080.

It is an arithmetic number, because the mean of its divisors is an integer number (36214080).

Almost surely, 2^72428159 is an apocalyptic number.

72428159 is a deficient number, since it is larger than the sum of its proper divisors (1).

72428159 is an equidigital number, since it uses as much as digits as its factorization.

72428159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 72428159 is about 8510.4734885904. The cubic root of 72428159 is about 416.8397711314.

The spelling of 72428159 in words is "seventy-two million, four hundred twenty-eight thousand, one hundred fifty-nine".