72843901 has 6 divisors (see below), whose sum is σ = 78878490. Its totient is φ = 67240368.

The previous prime is 72843887. The next prime is 72843907. The reversal of 72843901 is 10934827.

It can be written as a sum of positive squares in 3 ways, for example, as 423801 + 72420100 = 651^2 + 8510^2 .

It is not a de Polignac number, because 72843901 - 2⁷ = 72843773 is a prime.

It is a super-3 number, since 3×72843901³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72843907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215346 + ... + 215683.

It is an arithmetic number, because the mean of its divisors is an integer number (13146415).

Almost surely, 2^72843901 is an apocalyptic number.

It is an amenable number.

72843901 is a deficient number, since it is larger than the sum of its proper divisors (6034589).

72843901 is a wasteful number, since it uses less digits than its factorization.

72843901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431055 (or 431042 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 72843901 is about 8534.8638536300. The cubic root of 72843901 is about 417.6358117687.

The spelling of 72843901 in words is "seventy-two million, eight hundred forty-three thousand, nine hundred one".