687972070 has 8 divisors (see below), whose sum is σ = 1238349744. Its totient is φ = 275188824.

The previous prime is 687972059. The next prime is 687972071. The reversal of 687972070 is 70279786.

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

It is a self number, because there is not a number n which added to its sum of digits gives 687972070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687972071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34398594 + ... + 34398613.

It is an arithmetic number, because the mean of its divisors is an integer number (154793718).

Almost surely, 2^687972070 is an apocalyptic number.

687972070 is a deficient number, since it is larger than the sum of its proper divisors (550377674).

687972070 is a wasteful number, since it uses less digits than its factorization.

687972070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68797214.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 687972070 is about 26229.2216811708. The cubic root of 687972070 is about 882.7890462843.

The spelling of 687972070 in words is "six hundred eighty-seven million, nine hundred seventy-two thousand, seventy".