72321849 has 8 divisors (see below), whose sum is σ = 107143520. Its totient is φ = 48214548.

The previous prime is 72321841. The next prime is 72321857. The reversal of 72321849 is 94812327.

It is an interprime number because it is at equal distance from previous prime (72321841) and next prime (72321857).

It is not a de Polignac number, because 72321849 - 2³ = 72321841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72321841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339267 + ... + 1339320.

It is an arithmetic number, because the mean of its divisors is an integer number (13392940).

Almost surely, 2^72321849 is an apocalyptic number.

It is an amenable number.

72321849 is a deficient number, since it is larger than the sum of its proper divisors (34821671).

72321849 is a wasteful number, since it uses less digits than its factorization.

72321849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678596 (or 2678590 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 72321849 is about 8504.2253615482. The cubic root of 72321849 is about 416.6357255602.

The spelling of 72321849 in words is "seventy-two million, three hundred twenty-one thousand, eight hundred forty-nine".