72741605 has 4 divisors (see below), whose sum is σ = 87289932. Its totient is φ = 58193280.

The previous prime is 72741601. The next prime is 72741637. The reversal of 72741605 is 50614727.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 60949249 = 3434^2 + 7807^2 .

It is not a de Polignac number, because 72741605 - 2² = 72741601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72741601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274156 + ... + 7274165.

It is an arithmetic number, because the mean of its divisors is an integer number (21822483).

Almost surely, 2^72741605 is an apocalyptic number.

It is an amenable number.

72741605 is a deficient number, since it is larger than the sum of its proper divisors (14548327).

72741605 is a wasteful number, since it uses less digits than its factorization.

72741605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14548326.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 72741605 is about 8528.8689168025. The cubic root of 72741605 is about 417.4402223569.

The spelling of 72741605 in words is "seventy-two million, seven hundred forty-one thousand, six hundred five".