687623142 has 16 divisors (see below), whose sum is σ = 1375875072. Its totient is φ = 229102920.

The previous prime is 687623137. The next prime is 687623197. The reversal of 687623142 is 241326786.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 687623142.

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, 11334 + ... + 38777.

It is an arithmetic number, because the mean of its divisors is an integer number (85992192).

Almost surely, 2^687623142 is an apocalyptic number.

687623142 is an abundant number, since it is smaller than the sum of its proper divisors (688251930).

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

687623142 is a wasteful number, since it uses less digits than its factorization.

687623142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52403.

The product of its digits is 96768, while the sum is 39.

The square root of 687623142 is about 26222.5693249155. The cubic root of 687623142 is about 882.6397757347.

The spelling of 687623142 in words is "six hundred eighty-seven million, six hundred twenty-three thousand, one hundred forty-two".