1959318121 has 2 divisors, whose sum is σ = 1959318122. Its totient is φ = 1959318120.

The previous prime is 1959318107. The next prime is 1959318131. The reversal of 1959318121 is 1218139591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1941636096 + 17682025 = 44064^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959318121 - 2¹³ = 1959309929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1959318131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979659060 + 979659061.

It is an arithmetic number, because the mean of its divisors is an integer number (979659061).

Almost surely, 2^1959318121 is an apocalyptic number.

It is an amenable number.

1959318121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959318121 is an equidigital number, since it uses as much as digits as its factorization.

1959318121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The square root of 1959318121 is about 44264.1855341313. The cubic root of 1959318121 is about 1251.3198051477.

The spelling of 1959318121 in words is "one billion, nine hundred fifty-nine million, three hundred eighteen thousand, one hundred twenty-one".