687958379957 has 8 divisors (see below), whose sum is σ = 694716933120. Its totient is φ = 681225672960.

The previous prime is 687958379951. The next prime is 687958379963. The reversal of 687958379957 is 759973859786.

It is an interprime number because it is at equal distance from previous prime (687958379951) and next prime (687958379963).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687958379957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687958379951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6408044 + ... + 6514517.

It is an arithmetic number, because the mean of its divisors is an integer number (86839616640).

Almost surely, 2^687958379957 is an apocalyptic number.

It is an amenable number.

687958379957 is a deficient number, since it is larger than the sum of its proper divisors (6758553163).

687958379957 is a wasteful number, since it uses less digits than its factorization.

687958379957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923083.

The product of its digits is 7201353600, while the sum is 83.

The spelling of 687958379957 in words is "six hundred eighty-seven billion, nine hundred fifty-eight million, three hundred seventy-nine thousand, nine hundred fifty-seven".