91369090 has 32 divisors (see below), whose sum is σ = 170449920. Its totient is φ = 35227200.

The previous prime is 91369079. The next prime is 91369129. The reversal of 91369090 is 9096319.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110880 + ... + 111700.

It is an arithmetic number, because the mean of its divisors is an integer number (5326560).

Almost surely, 2^91369090 is an apocalyptic number.

91369090 is a deficient number, since it is larger than the sum of its proper divisors (79080830).

91369090 is a wasteful number, since it uses less digits than its factorization.

91369090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 91369090 is about 9558.7180102773. The cubic root of 91369090 is about 450.4014360191.

The spelling of 91369090 in words is "ninety-one million, three hundred sixty-nine thousand, ninety".