1959318149 has 2 divisors, whose sum is σ = 1959318150. Its totient is φ = 1959318148.

The previous prime is 1959318131. The next prime is 1959318161. The reversal of 1959318149 is 9418139591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1790136100 + 169182049 = 42310^2 + 13007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959318149 - 2¹² = 1959314053 is a prime.

It is a super-4 number, since 4×1959318149⁴ (a number of 38 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1959318097 and 1959318106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1959318749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979659074 + 979659075.

It is an arithmetic number, because the mean of its divisors is an integer number (979659075).

Almost surely, 2^1959318149 is an apocalyptic number.

It is an amenable number.

1959318149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959318149 is an equidigital number, since it uses as much as digits as its factorization.

1959318149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 50.

The square root of 1959318149 is about 44264.1858504141. The cubic root of 1959318149 is about 1251.3198111085.

The spelling of 1959318149 in words is "one billion, nine hundred fifty-nine million, three hundred eighteen thousand, one hundred forty-nine".