1966915129 has 2 divisors, whose sum is σ = 1966915130. Its totient is φ = 1966915128.

The previous prime is 1966915123. The next prime is 1966915151. The reversal of 1966915129 is 9215196691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1791405625 + 175509504 = 42325^2 + 13248^2 .

It is an emirp because it is prime and its reverse (9215196691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966915129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1966915123) 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, 983457564 + 983457565.

It is an arithmetic number, because the mean of its divisors is an integer number (983457565).

Almost surely, 2^1966915129 is an apocalyptic number.

It is an amenable number.

1966915129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966915129 is an equidigital number, since it uses as much as digits as its factorization.

1966915129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 49.

The square root of 1966915129 is about 44349.9168995839. The cubic root of 1966915129 is about 1252.9349974251.

The spelling of 1966915129 in words is "one billion, nine hundred sixty-six million, nine hundred fifteen thousand, one hundred twenty-nine".