1869401129 has 2 divisors, whose sum is σ = 1869401130. Its totient is φ = 1869401128.

The previous prime is 1869401111. The next prime is 1869401179. The reversal of 1869401129 is 9211049681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1866672025 + 2729104 = 43205^2 + 1652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1869401129 - 2¹⁶ = 1869335593 is a prime.

It is a super-2 number, since 2×1869401129² = 6989321162212949282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1869401179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934700564 + 934700565.

It is an arithmetic number, because the mean of its divisors is an integer number (934700565).

Almost surely, 2^1869401129 is an apocalyptic number.

It is an amenable number.

1869401129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1869401129 is an equidigital number, since it uses as much as digits as its factorization.

1869401129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1869401129 is about 43236.5716610371. The cubic root of 1869401129 is about 1231.8774353900.

The spelling of 1869401129 in words is "one billion, eight hundred sixty-nine million, four hundred one thousand, one hundred twenty-nine".