91742773 has 4 divisors (see below), whose sum is σ = 96571360. Its totient is φ = 86914188.

The previous prime is 91742771. The next prime is 91742801. The reversal of 91742773 is 37724719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91742773 - 2¹ = 91742771 is a prime.

It is a super-3 number, since 3×91742773³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91742771) 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, 2414265 + ... + 2414302.

It is an arithmetic number, because the mean of its divisors is an integer number (24142840).

Almost surely, 2^91742773 is an apocalyptic number.

It is an amenable number.

91742773 is a deficient number, since it is larger than the sum of its proper divisors (4828587).

91742773 is a wasteful number, since it uses less digits than its factorization.

91742773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828586.

The product of its digits is 74088, while the sum is 40.

The square root of 91742773 is about 9578.2447765757. The cubic root of 91742773 is about 451.0146208897.

The spelling of 91742773 in words is "ninety-one million, seven hundred forty-two thousand, seven hundred seventy-three".