991400002 has 8 divisors (see below), whose sum is σ = 1521683856. Its totient is φ = 484172052.

The previous prime is 991399991. The next prime is 991400021. The reversal of 991400002 is 200004199.

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 991400002.

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, 5763868 + ... + 5764039.

It is an arithmetic number, because the mean of its divisors is an integer number (190210482).

Almost surely, 2^991400002 is an apocalyptic number.

991400002 is a deficient number, since it is larger than the sum of its proper divisors (530283854).

991400002 is a wasteful number, since it uses less digits than its factorization.

991400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527952.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 991400002 is about 31486.5050775725. The cubic root of 991400002 is about 997.1250767368.

The spelling of 991400002 in words is "nine hundred ninety-one million, four hundred thousand, two".