1994890263 has 8 divisors (see below), whose sum is σ = 2687275248. Its totient is φ = 1316216064.

The previous prime is 1994890243. The next prime is 1994890307. The reversal of 1994890263 is 3620984991.

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

It is not a de Polignac number, because 1994890263 - 2¹² = 1994886167 is a prime.

It is a super-2 number, since 2×1994890263² = 7959174322824418338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994890243) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3427356 + ... + 3427937.

It is an arithmetic number, because the mean of its divisors is an integer number (335909406).

Almost surely, 2^1994890263 is an apocalyptic number.

1994890263 is a deficient number, since it is larger than the sum of its proper divisors (692384985).

1994890263 is an equidigital number, since it uses as much as digits as its factorization.

1994890263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6855393.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 1994890263 is about 44664.1944179003. The cubic root of 1994890263 is about 1258.8471572892.

The spelling of 1994890263 in words is "one billion, nine hundred ninety-four million, eight hundred ninety thousand, two hundred sixty-three".