687140554 has 8 divisors (see below), whose sum is σ = 1034515008. Its totient is φ = 342302220.

The previous prime is 687140551. The next prime is 687140569. The reversal of 687140554 is 455041786.

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

It is a super-3 number, since 3×687140554³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (687140551) 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 3 ways as a sum of consecutive naturals, for example, 633352 + ... + 634435.

It is an arithmetic number, because the mean of its divisors is an integer number (129314376).

Almost surely, 2^687140554 is an apocalyptic number.

687140554 is a deficient number, since it is larger than the sum of its proper divisors (347374454).

687140554 is a wasteful number, since it uses less digits than its factorization.

687140554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268060.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 687140554 is about 26213.3659418244. The cubic root of 687140554 is about 882.4332425219.

The spelling of 687140554 in words is "six hundred eighty-seven million, one hundred forty thousand, five hundred fifty-four".