1687402045 has 8 divisors (see below), whose sum is σ = 2314151424. Its totient is φ = 1157075664.

The previous prime is 1687402039. The next prime is 1687402097. The reversal of 1687402045 is 5402047861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1687402045 - 2²⁹ = 1150531133 is a prime.

It is a super-2 number, since 2×1687402045² = 5694651322940364050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1687401995 and 1687402013.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 24105709 + ... + 24105778.

It is an arithmetic number, because the mean of its divisors is an integer number (289268928).

Almost surely, 2^1687402045 is an apocalyptic number.

It is an amenable number.

1687402045 is a deficient number, since it is larger than the sum of its proper divisors (626749379).

1687402045 is an equidigital number, since it uses as much as digits as its factorization.

1687402045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48211499.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1687402045 is about 41077.9995252933. Note that the first 3 decimals coincide. The cubic root of 1687402045 is about 1190.5277524015.

The spelling of 1687402045 in words is "one billion, six hundred eighty-seven million, four hundred two thousand, forty-five".