3610687921 has 3 divisors (see below), whose sum is σ = 3610748011. Its totient is φ = 3610627832.

The previous prime is 3610687907. The next prime is 3610687943. The reversal of 3610687921 is 1297860163.

The square root of 3610687921 is 60089.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1297860163 = 1657 ⋅783259.

It can be written as a sum of positive squares in only one way, i.e., 3595321521 + 15366400 = 59961^2 + 3920^2 .

It is not a de Polignac number, because 3610687921 - 2¹⁹ = 3610163633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3610687121) 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 2 ways as a sum of consecutive naturals, for example, 30045 + ... + 90133.

Almost surely, 2^3610687921 is an apocalyptic number.

3610687921 is the 60089-th square number.

3610687921 is the 30045-th centered octagonal number.

It is an amenable number.

3610687921 is a deficient number, since it is larger than the sum of its proper divisors (60090).

3610687921 is an frugal number, since it uses more digits than its factorization.

3610687921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120178 (or 60089 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The cubic root of 3610687921 is about 1534.1340801127.

The spelling of 3610687921 in words is "three billion, six hundred ten million, six hundred eighty-seven thousand, nine hundred twenty-one".