73731091 has 8 divisors (see below), whose sum is σ = 89220960. Its totient is φ = 59480448.

The previous prime is 73731089. The next prime is 73731101. The reversal of 73731091 is 19013737.

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 73731091 - 2¹ = 73731089 is a prime.

It is a super-3 number, since 3×73731091³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73731041) 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, 309676 + ... + 309913.

It is an arithmetic number, because the mean of its divisors is an integer number (11152620).

Almost surely, 2^73731091 is an apocalyptic number.

73731091 is a deficient number, since it is larger than the sum of its proper divisors (15489869).

73731091 is a wasteful number, since it uses less digits than its factorization.

73731091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619613.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 73731091 is about 8586.6810235387. The cubic root of 73731091 is about 419.3244828813.

It can be divided in two parts, 7373 and 1091, that added together give a square (8464 = 92²).

The spelling of 73731091 in words is "seventy-three million, seven hundred thirty-one thousand, ninety-one".