91161190 has 16 divisors (see below), whose sum is σ = 171224928. Its totient is φ = 34878976.

The previous prime is 91161151. The next prime is 91161209. The reversal of 91161190 is 9116119.

It is a super-2 number, since 2×91161190² = 16620725124432200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197947 + ... + 198406.

It is an arithmetic number, because the mean of its divisors is an integer number (10701558).

Almost surely, 2^91161190 is an apocalyptic number.

91161190 is a deficient number, since it is larger than the sum of its proper divisors (80063738).

91161190 is a wasteful number, since it uses less digits than its factorization.

91161190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396383.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 91161190 is about 9547.8369278073. The cubic root of 91161190 is about 450.0595641319.

The spelling of 91161190 in words is "ninety-one million, one hundred sixty-one thousand, one hundred ninety".