991098367 has 8 divisors (see below), whose sum is σ = 1135511712. Its totient is φ = 847392000.

The previous prime is 991098337. The next prime is 991098389. The reversal of 991098367 is 763890199.

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

It is not a de Polignac number, because 991098367 - 2¹⁵ = 991065599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991098337) 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, 173734 + ... + 179347.

It is an arithmetic number, because the mean of its divisors is an integer number (141938964).

Almost surely, 2^991098367 is an apocalyptic number.

991098367 is a deficient number, since it is larger than the sum of its proper divisors (144413345).

991098367 is a wasteful number, since it uses less digits than its factorization.

991098367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353489.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 991098367 is about 31481.7148039938. The cubic root of 991098367 is about 997.0239408582.

The spelling of 991098367 in words is "nine hundred ninety-one million, ninety-eight thousand, three hundred sixty-seven".