687090834 has 24 divisors (see below), whose sum is σ = 1516787532. Its totient is φ = 224708640.

The previous prime is 687090827. The next prime is 687090841. The reversal of 687090834 is 438090786.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (687090827) and next prime (687090841).

It can be written as a sum of positive squares in 2 ways, for example, as 657768609 + 29322225 = 25647^2 + 5415^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 687090834.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359157 + ... + 361064.

Almost surely, 2^687090834 is an apocalyptic number.

687090834 is an abundant number, since it is smaller than the sum of its proper divisors (829696698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687090834 is a wasteful number, since it uses less digits than its factorization.

687090834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720282 (or 720279 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 687090834 is about 26212.4175535184. The cubic root of 687090834 is about 882.4119583568.

The spelling of 687090834 in words is "six hundred eighty-seven million, ninety thousand, eight hundred thirty-four".