3678621697 has 8 divisors (see below), whose sum is σ = 3716275752. Its totient is φ = 3640992000.

The previous prime is 3678621691. The next prime is 3678621701. The reversal of 3678621697 is 7961268763.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3281456656 + 397165041 = 57284^2 + 19929^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3678621697 - 2³ = 3678621689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3678621691) 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, 584793 + ... + 591049.

It is an arithmetic number, because the mean of its divisors is an integer number (464534469).

Almost surely, 2^3678621697 is an apocalyptic number.

It is an amenable number.

3678621697 is a deficient number, since it is larger than the sum of its proper divisors (37654055).

3678621697 is a wasteful number, since it uses less digits than its factorization.

3678621697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12179.

The product of its digits is 4572288, while the sum is 55.

The square root of 3678621697 is about 60651.6421624345. The cubic root of 3678621697 is about 1543.6957530545.

The spelling of 3678621697 in words is "three billion, six hundred seventy-eight million, six hundred twenty-one thousand, six hundred ninety-seven".