1994426983 has 2 divisors, whose sum is σ = 1994426984. Its totient is φ = 1994426982.

The previous prime is 1994426977. The next prime is 1994427053. The reversal of 1994426983 is 3896244991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1994426983 - 2²⁹ = 1457556071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994426953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997213491 + 997213492.

It is an arithmetic number, because the mean of its divisors is an integer number (997213492).

Almost surely, 2^1994426983 is an apocalyptic number.

1994426983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994426983 is an equidigital number, since it uses as much as digits as its factorization.

1994426983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 55.

The square root of 1994426983 is about 44659.0078595573. The cubic root of 1994426983 is about 1258.7497009907.

The spelling of 1994426983 in words is "one billion, nine hundred ninety-four million, four hundred twenty-six thousand, nine hundred eighty-three".