91138202 has 16 divisors (see below), whose sum is σ = 141575424. Its totient is φ = 43956000.

The previous prime is 91138181. The next prime is 91138261. The reversal of 91138202 is 20283119.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18302 + ... + 22742.

It is an arithmetic number, because the mean of its divisors is an integer number (8848464).

Almost surely, 2^91138202 is an apocalyptic number.

91138202 is a deficient number, since it is larger than the sum of its proper divisors (50437222).

91138202 is a wasteful number, since it uses less digits than its factorization.

91138202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 91138202 is about 9546.6330190282. The cubic root of 91138202 is about 450.0217306378.

The spelling of 91138202 in words is "ninety-one million, one hundred thirty-eight thousand, two hundred two".