1946987129 has 2 divisors, whose sum is σ = 1946987130. Its totient is φ = 1946987128.

The previous prime is 1946987071. The next prime is 1946987137. The reversal of 1946987129 is 9217896491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1333929529 + 613057600 = 36523^2 + 24760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1946987129 - 2²⁸ = 1678551673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1946987149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973493564 + 973493565.

It is an arithmetic number, because the mean of its divisors is an integer number (973493565).

Almost surely, 2^1946987129 is an apocalyptic number.

It is an amenable number.

1946987129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1946987129 is an equidigital number, since it uses as much as digits as its factorization.

1946987129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 56.

The square root of 1946987129 is about 44124.6770979687. The cubic root of 1946987129 is about 1248.6892134714.

The spelling of 1946987129 in words is "one billion, nine hundred forty-six million, nine hundred eighty-seven thousand, one hundred twenty-nine".