1959472121 has 2 divisors, whose sum is σ = 1959472122. Its totient is φ = 1959472120.

The previous prime is 1959472091. The next prime is 1959472133. The reversal of 1959472121 is 1212749591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1834837225 + 124634896 = 42835^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959472121 - 2⁶ = 1959472057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1959472171) 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, 979736060 + 979736061.

It is an arithmetic number, because the mean of its divisors is an integer number (979736061).

Almost surely, 2^1959472121 is an apocalyptic number.

It is an amenable number.

1959472121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959472121 is an equidigital number, since it uses as much as digits as its factorization.

1959472121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 1959472121 is about 44265.9250552838. The cubic root of 1959472121 is about 1251.3525883559.

The spelling of 1959472121 in words is "one billion, nine hundred fifty-nine million, four hundred seventy-two thousand, one hundred twenty-one".