72373705 has 8 divisors (see below), whose sum is σ = 89843400. Its totient is φ = 55902336.

The previous prime is 72373699. The next prime is 72373723. The reversal of 72373705 is 50737327.

72373705 = 348² + 349² + ... + 637².

It can be written as a sum of positive squares in 4 ways, for example, as 2082249 + 70291456 = 1443^2 + 8384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72373705 - 2⁹ = 72373193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249420 + ... + 249709.

It is an arithmetic number, because the mean of its divisors is an integer number (11230425).

Almost surely, 2^72373705 is an apocalyptic number.

It is an amenable number.

72373705 is a deficient number, since it is larger than the sum of its proper divisors (17469695).

72373705 is a wasteful number, since it uses less digits than its factorization.

72373705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499163.

The product of its (nonzero) digits is 30870, while the sum is 34.

The square root of 72373705 is about 8507.2736525869. The cubic root of 72373705 is about 416.7352800784.

The spelling of 72373705 in words is "seventy-two million, three hundred seventy-three thousand, seven hundred five".