687434454 has 48 divisors (see below), whose sum is σ = 1743749280. Its totient is φ = 191617920.

The previous prime is 687434453. The next prime is 687434467. The reversal of 687434454 is 454434786.

It is a super-2 number, since 2×687434454² = 945132257092556232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687434453) 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 in 23 ways as a sum of consecutive naturals, for example, 61369 + ... + 71700.

It is an arithmetic number, because the mean of its divisors is an integer number (36328110).

Almost surely, 2^687434454 is an apocalyptic number.

687434454 is an abundant number, since it is smaller than the sum of its proper divisors (1056314826).

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

687434454 is a wasteful number, since it uses less digits than its factorization.

687434454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133125 (or 133122 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

The square root of 687434454 is about 26218.9712612833. The cubic root of 687434454 is about 882.5590344295.

It can be divided in two parts, 6874 and 34454, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 687434454 in words is "six hundred eighty-seven million, four hundred thirty-four thousand, four hundred fifty-four".