687070 has 16 divisors (see below), whose sum is σ = 1248768. Its totient is φ = 272160.

The previous prime is 687061. The next prime is 687073. The reversal of 687070 is 70786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (78048).

2⁶⁸⁷⁰⁷⁰ is an apocalyptic number.

687070 is a deficient number, since it is larger than the sum of its proper divisors (561698).

687070 is a wasteful number, since it uses less digits than its factorization.

687070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 687070 is about 828.8968572748. The cubic root of 687070 is about 88.2403039421.

The spelling of 687070 in words is "six hundred eighty-seven thousand, seventy".