687414454 has 4 divisors (see below), whose sum is σ = 1031121684. Its totient is φ = 343707226.

The previous prime is 687414451. The next prime is 687414493. The reversal of 687414454 is 454414786.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 687414454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687414451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171853612 + ... + 171853615.

It is an arithmetic number, because the mean of its divisors is an integer number (257780421).

Almost surely, 2^687414454 is an apocalyptic number.

687414454 is a deficient number, since it is larger than the sum of its proper divisors (343707230).

687414454 is a wasteful number, since it uses less digits than its factorization.

687414454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343707229.

The product of its digits is 430080, while the sum is 43.

The square root of 687414454 is about 26218.5898552916. The cubic root of 687414454 is about 882.5504753823.

The spelling of 687414454 in words is "six hundred eighty-seven million, four hundred fourteen thousand, four hundred fifty-four".