3945345313 has 8 divisors (see below), whose sum is σ = 4855809728. Its totient is φ = 3121591824.

The previous prime is 3945345277. The next prime is 3945345337. The reversal of 3945345313 is 3135435493.

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

It is not a de Polignac number, because 3945345313 - 2⁹ = 3945344801 is a prime.

It is a super-2 number, since 2×3945345313² = 31131499277622135938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3945345013) 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, 21677631 + ... + 21677812.

It is an arithmetic number, because the mean of its divisors is an integer number (606976216).

Almost surely, 2^3945345313 is an apocalyptic number.

It is an amenable number.

3945345313 is a deficient number, since it is larger than the sum of its proper divisors (910464415).

3945345313 is a wasteful number, since it uses less digits than its factorization.

3945345313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43355463.

The product of its digits is 291600, while the sum is 40.

The square root of 3945345313 is about 62811.9838327050. The cubic root of 3945345313 is about 1580.1379617020.

The spelling of 3945345313 in words is "three billion, nine hundred forty-five million, three hundred forty-five thousand, three hundred thirteen".