91149667 has 16 divisors (see below), whose sum is σ = 109509120. Its totient is φ = 74175552.

The previous prime is 91149661. The next prime is 91149671. The reversal of 91149667 is 76694119.

It is a happy number.

It is not a de Polignac number, because 91149667 - 2³ = 91149659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91149661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20343 + ... + 24415.

It is an arithmetic number, because the mean of its divisors is an integer number (6844320).

Almost surely, 2^91149667 is an apocalyptic number.

91149667 is a deficient number, since it is larger than the sum of its proper divisors (18359453).

91149667 is a wasteful number, since it uses less digits than its factorization.

91149667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242.

The product of its digits is 81648, while the sum is 43.

The square root of 91149667 is about 9547.2334736299. The cubic root of 91149667 is about 450.0406004520.

It can be divided in two parts, 9114 and 9667, that added together give a palindrome (18781).

The spelling of 91149667 in words is "ninety-one million, one hundred forty-nine thousand, six hundred sixty-seven".