91161471 has 8 divisors (see below), whose sum is σ = 125740080. Its totient is φ = 58678592.

The previous prime is 91161461. The next prime is 91161481. The reversal of 91161471 is 17416119.

It is an interprime number because it is at equal distance from previous prime (91161461) and next prime (91161481).

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 91161471 - 2⁵ = 91161439 is a prime.

It is a super-3 number, since 3×91161471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91161401) 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 7 ways as a sum of consecutive naturals, for example, 523830 + ... + 524003.

It is an arithmetic number, because the mean of its divisors is an integer number (15717510).

Almost surely, 2^91161471 is an apocalyptic number.

91161471 is a deficient number, since it is larger than the sum of its proper divisors (34578609).

91161471 is a wasteful number, since it uses less digits than its factorization.

91161471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047865.

The product of its digits is 1512, while the sum is 30.

The square root of 91161471 is about 9547.8516431708. The cubic root of 91161471 is about 450.0600265605.

The spelling of 91161471 in words is "ninety-one million, one hundred sixty-one thousand, four hundred seventy-one".