991006163 has 8 divisors (see below), whose sum is σ = 1133015040. Its totient is φ = 849106440.

The previous prime is 991006153. The next prime is 991006193. The reversal of 991006163 is 361600199.

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

It is not a de Polignac number, because 991006163 - 2⁴ = 991006147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991006153) 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, 6803 + ... + 45036.

It is an arithmetic number, because the mean of its divisors is an integer number (141626880).

Almost surely, 2^991006163 is an apocalyptic number.

991006163 is a deficient number, since it is larger than the sum of its proper divisors (142008877).

991006163 is a wasteful number, since it uses less digits than its factorization.

991006163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54577.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 991006163 is about 31480.2503643157. The cubic root of 991006163 is about 996.9930214764.

The spelling of 991006163 in words is "nine hundred ninety-one million, six thousand, one hundred sixty-three".