73081691 has 8 divisors (see below), whose sum is σ = 77947920. Its totient is φ = 68278528.

The previous prime is 73081667. The next prime is 73081699. The reversal of 73081691 is 19618037.

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

It is not a de Polignac number, because 73081691 - 2⁶ = 73081627 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13361 + ... + 18018.

It is an arithmetic number, because the mean of its divisors is an integer number (9743490).

Almost surely, 2^73081691 is an apocalyptic number.

73081691 is a deficient number, since it is larger than the sum of its proper divisors (4866229).

73081691 is a wasteful number, since it uses less digits than its factorization.

73081691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31533.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 73081691 is about 8548.7830128036. The cubic root of 73081691 is about 418.0897585073.

The spelling of 73081691 in words is "seventy-three million, eighty-one thousand, six hundred ninety-one".