91073305 has 8 divisors (see below), whose sum is σ = 111079944. Its totient is φ = 71664000.

The previous prime is 91073299. The next prime is 91073309. The reversal of 91073305 is 50337019.

It can be written as a sum of positive squares in 4 ways, for example, as 1411344 + 89661961 = 1188^2 + 9469^2 .

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

It is not a de Polignac number, because 91073305 - 2¹³ = 91065113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91073309) 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, 148996 + ... + 149605.

It is an arithmetic number, because the mean of its divisors is an integer number (13884993).

Almost surely, 2^91073305 is an apocalyptic number.

It is an amenable number.

91073305 is a deficient number, since it is larger than the sum of its proper divisors (20006639).

91073305 is a wasteful number, since it uses less digits than its factorization.

91073305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298667.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 91073305 is about 9543.2334667030. The cubic root of 91073305 is about 449.9148892534.

It can be divided in two parts, 91073 and 305, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 91073305 in words is "ninety-one million, seventy-three thousand, three hundred five".