73081690 has 16 divisors (see below), whose sum is σ = 143506080. Its totient is φ = 26575120.

The previous prime is 73081667. The next prime is 73081699. The reversal of 73081690 is 9618037.

It is a super-2 number, since 2×73081690² = 10681866826512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73081699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332080 + ... + 332299.

It is an arithmetic number, because the mean of its divisors is an integer number (8969130).

Almost surely, 2^73081690 is an apocalyptic number.

73081690 is a deficient number, since it is larger than the sum of its proper divisors (70424390).

73081690 is a wasteful number, since it uses less digits than its factorization.

73081690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664397.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 73081690 is about 8548.7829543158. The cubic root of 73081690 is about 418.0897566004.

It can be divided in two parts, 7308 and 1690, that added together give a palindrome (8998).

The spelling of 73081690 in words is "seventy-three million, eighty-one thousand, six hundred ninety".