687101613 has 8 divisors (see below), whose sum is σ = 999420576. Its totient is φ = 416425200.

The previous prime is 687101587. The next prime is 687101633. The reversal of 687101613 is 316101786.

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

It is not a de Polignac number, because 687101613 - 2⁹ = 687101101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20821261 = 687101613 / (6 + 8 + 7 + 1 + 0 + 1 + 6 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687101633) 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, 10410598 + ... + 10410663.

It is an arithmetic number, because the mean of its divisors is an integer number (124927572).

Almost surely, 2^687101613 is an apocalyptic number.

It is an amenable number.

687101613 is a deficient number, since it is larger than the sum of its proper divisors (312318963).

687101613 is a wasteful number, since it uses less digits than its factorization.

687101613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20821275.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 687101613 is about 26212.6231613702. The cubic root of 687101613 is about 882.4165727243.

The spelling of 687101613 in words is "six hundred eighty-seven million, one hundred one thousand, six hundred thirteen".