91617061 has 4 divisors (see below), whose sum is σ = 94776300. Its totient is φ = 88457824.

The previous prime is 91617023. The next prime is 91617067. The reversal of 91617061 is 16071619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16071619 = 157 ⋅102367.

It can be written as a sum of positive squares in 2 ways, for example, as 15752961 + 75864100 = 3969^2 + 8710^2 .

It is a cyclic number.

It is not a de Polignac number, because 91617061 - 2⁷ = 91616933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91617067) 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 3 ways as a sum of consecutive naturals, for example, 1579576 + ... + 1579633.

It is an arithmetic number, because the mean of its divisors is an integer number (23694075).

Almost surely, 2^91617061 is an apocalyptic number.

It is an amenable number.

91617061 is a deficient number, since it is larger than the sum of its proper divisors (3159239).

91617061 is a wasteful number, since it uses less digits than its factorization.

91617061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159238.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 91617061 is about 9571.6801555422. The cubic root of 91617061 is about 450.8085233956.

The spelling of 91617061 in words is "ninety-one million, six hundred seventeen thousand, sixty-one".