1994884991 has 8 divisors (see below), whose sum is σ = 2181924864. Its totient is φ = 1808792920.

The previous prime is 1994884987. The next prime is 1994885003.

1994884991 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1994884991 - 2² = 1994884987 is a prime.

It is a super-2 number, since 2×1994884991² = 7959132254634140162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994884291) 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, 232541 + ... + 240966.

It is an arithmetic number, because the mean of its divisors is an integer number (272740608).

Almost surely, 2^1994884991 is an apocalyptic number.

1994884991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1994884991 is a deficient number, since it is larger than the sum of its proper divisors (187039873).

1994884991 is a wasteful number, since it uses less digits than its factorization.

1994884991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473901.

The product of its digits is 6718464, while the sum is 62.

The square root of 1994884991 is about 44664.1353996694. The cubic root of 1994884991 is about 1258.8460483480.

The spelling of 1994884991 in words is "one billion, nine hundred ninety-four million, eight hundred eighty-four thousand, nine hundred ninety-one".