3616957921 has 4 divisors (see below), whose sum is σ = 3617107732. Its totient is φ = 3616808112.

The previous prime is 3616957919. The next prime is 3616957931. The reversal of 3616957921 is 1297596163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2504001600 + 1112956321 = 50040^2 + 33361^2 .

It is a cyclic number.

It is not a de Polignac number, because 3616957921 - 2¹ = 3616957919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3616957931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29526 + ... + 90031.

It is an arithmetic number, because the mean of its divisors is an integer number (904276933).

Almost surely, 2^3616957921 is an apocalyptic number.

It is an amenable number.

3616957921 is a deficient number, since it is larger than the sum of its proper divisors (149811).

3616957921 is a wasteful number, since it uses less digits than its factorization.

3616957921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149810.

The product of its digits is 612360, while the sum is 49.

The square root of 3616957921 is about 60141.1499806913. The cubic root of 3616957921 is about 1535.0215802616.

The spelling of 3616957921 in words is "three billion, six hundred sixteen million, nine hundred fifty-seven thousand, nine hundred twenty-one".