1916129 has 2 divisors, whose sum is σ = 1916130. Its totient is φ = 1916128.

The previous prime is 1916099. The next prime is 1916147. The reversal of 1916129 is 9216191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 277729 = 1280^2 + 527^2 .

It is an emirp because it is prime and its reverse (9216191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1916129 - 2¹⁶ = 1850593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1916179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958064 + 958065.

It is an arithmetic number, because the mean of its divisors is an integer number (958065).

2^1916129 is an apocalyptic number.

It is an amenable number.

1916129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916129 is an equidigital number, since it uses as much as digits as its factorization.

1916129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 1916129 is about 1384.2431144853. The cubic root of 1916129 is about 124.2057155884.

The spelling of 1916129 in words is "one million, nine hundred sixteen thousand, one hundred twenty-nine".