91341778 has 16 divisors (see below), whose sum is σ = 157335840. Its totient is φ = 39333600.

The previous prime is 91341773. The next prime is 91341839. The reversal of 91341778 is 87714319.

It is a self number, because there is not a number n which added to its sum of digits gives 91341778.

It is not an unprimeable number, because it can be changed into a prime (91341773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108843 + ... + 109678.

It is an arithmetic number, because the mean of its divisors is an integer number (9833490).

Almost surely, 2^91341778 is an apocalyptic number.

91341778 is a deficient number, since it is larger than the sum of its proper divisors (65994062).

91341778 is a wasteful number, since it uses less digits than its factorization.

91341778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218553.

The product of its digits is 42336, while the sum is 40.

The square root of 91341778 is about 9557.2892600360. The cubic root of 91341778 is about 450.3565536272.

The spelling of 91341778 in words is "ninety-one million, three hundred forty-one thousand, seven hundred seventy-eight".