3721317345 has 24 divisors (see below), whose sum is σ = 6658359552. Its totient is φ = 1920679200.

The previous prime is 3721317343. The next prime is 3721317373. The reversal of 3721317345 is 5437131273.

It is not a de Polignac number, because 3721317345 - 2¹ = 3721317343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3721317343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1332411 + ... + 1335200.

It is an arithmetic number, because the mean of its divisors is an integer number (277431648).

Almost surely, 2^3721317345 is an apocalyptic number.

It is an amenable number.

3721317345 is a deficient number, since it is larger than the sum of its proper divisors (2937042207).

3721317345 is a wasteful number, since it uses less digits than its factorization.

3721317345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667653 (or 2667650 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 3721317345 is about 61002.6011330664. The cubic root of 3721317345 is about 1549.6450585115.

The spelling of 3721317345 in words is "three billion, seven hundred twenty-one million, three hundred seventeen thousand, three hundred forty-five".