1687034369 has 4 divisors (see below), whose sum is σ = 1687867860. Its totient is φ = 1686200880.

The previous prime is 1687034357. The next prime is 1687034399. The reversal of 1687034369 is 9634307861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1130640625 + 556393744 = 33625^2 + 23588^2 .

It is a cyclic number.

It is not a de Polignac number, because 1687034369 - 2²⁰ = 1685985793 is a prime.

It is a super-2 number, since 2×1687034369² = 5692169924374456322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687034399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413702 + ... + 417759.

It is an arithmetic number, because the mean of its divisors is an integer number (421966965).

Almost surely, 2^1687034369 is an apocalyptic number.

It is an amenable number.

1687034369 is a deficient number, since it is larger than the sum of its proper divisors (833491).

1687034369 is an equidigital number, since it uses as much as digits as its factorization.

1687034369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833490.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 1687034369 is about 41073.5239418290. The cubic root of 1687034369 is about 1190.4412762156.

The spelling of 1687034369 in words is "one billion, six hundred eighty-seven million, thirty-four thousand, three hundred sixty-nine".