91131202 has 8 divisors (see below), whose sum is σ = 137134476. Its totient is φ = 45419712.

The previous prime is 91131197. The next prime is 91131241. The reversal of 91131202 is 20213119.

It can be written as a sum of positive squares in 2 ways, for example, as 90611361 + 519841 = 9519^2 + 721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 91131202.

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 3 ways as a sum of consecutive naturals, for example, 72163 + ... + 73414.

Almost surely, 2^91131202 is an apocalyptic number.

91131202 is a deficient number, since it is larger than the sum of its proper divisors (46003274).

91131202 is a wasteful number, since it uses less digits than its factorization.

91131202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145892.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 91131202 is about 9546.2663905843. The cubic root of 91131202 is about 450.0102088219.

The spelling of 91131202 in words is "ninety-one million, one hundred thirty-one thousand, two hundred two".