1000991854 has 4 divisors (see below), whose sum is σ = 1501487784. Its totient is φ = 500495926.

The previous prime is 1000991833. The next prime is 1000991861. The reversal of 1000991854 is 4581990001.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250247962 + ... + 250247965.

It is an arithmetic number, because the mean of its divisors is an integer number (375371946).

Almost surely, 2^1000991854 is an apocalyptic number.

1000991854 is a deficient number, since it is larger than the sum of its proper divisors (500495930).

1000991854 is an equidigital number, since it uses as much as digits as its factorization.

1000991854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500495929.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 1000991854 is about 31638.4553036333. The cubic root of 1000991854 is about 1000.3305087519.

The spelling of 1000991854 in words is "one billion, nine hundred ninety-one thousand, eight hundred fifty-four".