3123631345 has 8 divisors (see below), whose sum is σ = 3787001064. Its totient is φ = 2473142784.

The previous prime is 3123631339. The next prime is 3123631349. The reversal of 3123631345 is 5431363213.

It can be written as a sum of positive squares in 4 ways, for example, as 1096470769 + 2027160576 = 33113^2 + 45024^2 .

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 3123631345 - 2²³ = 3115242737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3123631349) 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, 3219754 + ... + 3220723.

It is an arithmetic number, because the mean of its divisors is an integer number (473375133).

Almost surely, 2^3123631345 is an apocalyptic number.

It is an amenable number.

3123631345 is a deficient number, since it is larger than the sum of its proper divisors (663369719).

3123631345 is an equidigital number, since it uses as much as digits as its factorization.

3123631345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440579.

The product of its digits is 19440, while the sum is 31.

The square root of 3123631345 is about 55889.4564743655. The cubic root of 3123631345 is about 1461.7953994591.

Adding to 3123631345 its reverse (5431363213), we get a palindrome (8554994558).

The spelling of 3123631345 in words is "three billion, one hundred twenty-three million, six hundred thirty-one thousand, three hundred forty-five".