3721317445 has 8 divisors (see below), whose sum is σ = 4478833944. Its totient is φ = 2968218624.

The previous prime is 3721317433. The next prime is 3721317487. The reversal of 3721317445 is 5447131273.

It can be written as a sum of positive squares in 4 ways, for example, as 988850916 + 2732466529 = 31446^2 + 52273^2 .

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 3721317445 - 2¹³ = 3721309253 is a prime.

It is a super-2 number, since 2×3721317445² = 27696407052922656050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102564 + ... + 1105933.

It is an arithmetic number, because the mean of its divisors is an integer number (559854243).

Almost surely, 2^3721317445 is an apocalyptic number.

It is an amenable number.

3721317445 is a deficient number, since it is larger than the sum of its proper divisors (757516499).

3721317445 is a wasteful number, since it uses less digits than its factorization.

3721317445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208839.

The product of its digits is 70560, while the sum is 37.

The square root of 3721317445 is about 61002.6019527036. The cubic root of 3721317445 is about 1549.6450723923.

The spelling of 3721317445 in words is "three billion, seven hundred twenty-one million, three hundred seventeen thousand, four hundred forty-five".