72818105 has 4 divisors (see below), whose sum is σ = 87381732. Its totient is φ = 58254480.

The previous prime is 72818099. The next prime is 72818111. The reversal of 72818105 is 50181827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72818099) and next prime (72818111).

It can be written as a sum of positive squares in 2 ways, for example, as 42667024 + 30151081 = 6532^2 + 5491^2 .

It is not a de Polignac number, because 72818105 - 2⁶ = 72818041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7281806 + ... + 7281815.

It is an arithmetic number, because the mean of its divisors is an integer number (21845433).

Almost surely, 2^72818105 is an apocalyptic number.

It is an amenable number.

72818105 is a deficient number, since it is larger than the sum of its proper divisors (14563627).

72818105 is a wasteful number, since it uses less digits than its factorization.

72818105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14563626.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 72818105 is about 8533.3525064889. The cubic root of 72818105 is about 417.5865072275.

The spelling of 72818105 in words is "seventy-two million, eight hundred eighteen thousand, one hundred five".