687671542 has 8 divisors (see below), whose sum is σ = 1032055632. Its totient is φ = 343653000.

The previous prime is 687671533. The next prime is 687671563. The reversal of 687671542 is 245176786.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 687671492 and 687671501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86634 + ... + 94237.

It is an arithmetic number, because the mean of its divisors is an integer number (129006954).

Almost surely, 2^687671542 is an apocalyptic number.

687671542 is a deficient number, since it is larger than the sum of its proper divisors (344384090).

687671542 is a wasteful number, since it uses less digits than its factorization.

687671542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182774.

The product of its digits is 564480, while the sum is 46.

The square root of 687671542 is about 26223.4921778164. The cubic root of 687671542 is about 882.6604841530.

The spelling of 687671542 in words is "six hundred eighty-seven million, six hundred seventy-one thousand, five hundred forty-two".