687942070 has 8 divisors (see below), whose sum is σ = 1238295744. Its totient is φ = 275176824.

The previous prime is 687942023. The next prime is 687942083. The reversal of 687942070 is 70249786.

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

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, 34397094 + ... + 34397113.

It is an arithmetic number, because the mean of its divisors is an integer number (154786968).

Almost surely, 2^687942070 is an apocalyptic number.

687942070 is a deficient number, since it is larger than the sum of its proper divisors (550353674).

687942070 is a wasteful number, since it uses less digits than its factorization.

687942070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68794214.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 687942070 is about 26228.6497936893. The cubic root of 687942070 is about 882.7762143407.

The spelling of 687942070 in words is "six hundred eighty-seven million, nine hundred forty-two thousand, seventy".