1994365159 has 2 divisors, whose sum is σ = 1994365160. Its totient is φ = 1994365158.

The previous prime is 1994365127. The next prime is 1994365169. The reversal of 1994365159 is 9515634991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1994365159 - 2⁵ = 1994365127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994365169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997182579 + 997182580.

It is an arithmetic number, because the mean of its divisors is an integer number (997182580).

Almost surely, 2^1994365159 is an apocalyptic number.

1994365159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994365159 is an equidigital number, since it uses as much as digits as its factorization.

1994365159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 52.

The square root of 1994365159 is about 44658.3156758067. The cubic root of 1994365159 is about 1258.7366944570.

The spelling of 1994365159 in words is "one billion, nine hundred ninety-four million, three hundred sixty-five thousand, one hundred fifty-nine".