991168202 has 4 divisors (see below), whose sum is σ = 1486752306. Its totient is φ = 495584100.

The previous prime is 991168201. The next prime is 991168219. The reversal of 991168202 is 202861199.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 645617281 + 345550921 = 25409^2 + 18589^2 .

It is not an unprimeable number, because it can be changed into a prime (991168201) by changing a digit.

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 as a sum of consecutive naturals, namely, 247792049 + ... + 247792052.

Almost surely, 2^991168202 is an apocalyptic number.

991168202 is a deficient number, since it is larger than the sum of its proper divisors (495584104).

991168202 is a wasteful number, since it uses less digits than its factorization.

991168202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495584103.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 991168202 is about 31482.8239203538. The cubic root of 991168202 is about 997.0473578180.

The spelling of 991168202 in words is "nine hundred ninety-one million, one hundred sixty-eight thousand, two hundred two".