72071849 has 2 divisors, whose sum is σ = 72071850. Its totient is φ = 72071848.

The previous prime is 72071837. The next prime is 72071897. The reversal of 72071849 is 94817027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 11854249 = 7760^2 + 3443^2 .

It is an emirp because it is prime and its reverse (94817027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72071849 - 2¹² = 72067753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72031849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035924 + 36035925.

It is an arithmetic number, because the mean of its divisors is an integer number (36035925).

Almost surely, 2^72071849 is an apocalyptic number.

It is an amenable number.

72071849 is a deficient number, since it is larger than the sum of its proper divisors (1).

72071849 is an equidigital number, since it uses as much as digits as its factorization.

72071849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 72071849 is about 8489.5140614761. The cubic root of 72071849 is about 416.1551000338.

The spelling of 72071849 in words is "seventy-two million, seventy-one thousand, eight hundred forty-nine".