91690741 has 6 divisors (see below), whose sum is σ = 97401890. Its totient is φ = 86296896.

The previous prime is 91690733. The next prime is 91690759. The reversal of 91690741 is 14709619.

It can be written as a sum of positive squares in 3 ways, for example, as 44823025 + 46867716 = 6695^2 + 6846^2 .

It is not a de Polignac number, because 91690741 - 2³ = 91690733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91690741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91690771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158346 + ... + 158923.

Almost surely, 2^91690741 is an apocalyptic number.

It is an amenable number.

91690741 is a deficient number, since it is larger than the sum of its proper divisors (5711149).

91690741 is a wasteful number, since it uses less digits than its factorization.

91690741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317303 (or 317286 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 91690741 is about 9575.5282360818. The cubic root of 91690741 is about 450.9293403099.

The spelling of 91690741 in words is "ninety-one million, six hundred ninety thousand, seven hundred forty-one".