1951117159 has 2 divisors, whose sum is σ = 1951117160. Its totient is φ = 1951117158.

The previous prime is 1951117141. The next prime is 1951117199. The reversal of 1951117159 is 9517111591.

It is an a-pointer prime, because the next prime (1951117199) can be obtained adding 1951117159 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1951117159 - 2⁷ = 1951117031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1951117199) 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 as a sum of consecutive naturals, namely, 975558579 + 975558580.

It is an arithmetic number, because the mean of its divisors is an integer number (975558580).

Almost surely, 2^1951117159 is an apocalyptic number.

1951117159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951117159 is an equidigital number, since it uses as much as digits as its factorization.

1951117159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14175, while the sum is 40.

The square root of 1951117159 is about 44171.4518552424. The cubic root of 1951117159 is about 1249.5715137231.

The spelling of 1951117159 in words is "one billion, nine hundred fifty-one million, one hundred seventeen thousand, one hundred fifty-nine".