687025476901 has 8 divisors (see below), whose sum is σ = 696080076120. Its totient is φ = 678023066112.

The previous prime is 687025476887. The next prime is 687025476941. The reversal of 687025476901 is 109674520786.

It is a Cunningham number, because it is equal to 828870²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 12105720676 + 674919756225 = 110026^2 + 821535^2 .

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-687025476901 is a prime.

It is a super-2 number, since 2×687025476901² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687025476941) 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, 13020606 + ... + 13073263.

It is an arithmetic number, because the mean of its divisors is an integer number (87010009515).

Almost surely, 2^687025476901 is an apocalyptic number.

It is an amenable number.

687025476901 is a deficient number, since it is larger than the sum of its proper divisors (9054599219).

687025476901 is a wasteful number, since it uses less digits than its factorization.

687025476901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26094215.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 687025476901 in words is "six hundred eighty-seven billion, twenty-five million, four hundred seventy-six thousand, nine hundred one".