3126312989 has 4 divisors (see below), whose sum is σ = 3137438940. Its totient is φ = 3115187040.

The previous prime is 3126312923. The next prime is 3126313027. The reversal of 3126312989 is 9892136213.

3126312989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9892136213 = 14813 ⋅667801.

It can be written as a sum of positive squares in 2 ways, for example, as 1175324089 + 1950988900 = 34283^2 + 44170^2 .

It is a cyclic number.

It is not a de Polignac number, because 3126312989 - 2¹² = 3126308893 is a prime.

It is a super-2 number, since 2×3126312989² = 19547665810380228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3126312919) 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, 5562554 + ... + 5563115.

It is an arithmetic number, because the mean of its divisors is an integer number (784359735).

Almost surely, 2^3126312989 is an apocalyptic number.

It is an amenable number.

3126312989 is a deficient number, since it is larger than the sum of its proper divisors (11125951).

3126312989 is a wasteful number, since it uses less digits than its factorization.

3126312989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11125950.

The product of its digits is 139968, while the sum is 44.

The square root of 3126312989 is about 55913.4419348335. The cubic root of 3126312989 is about 1462.2135979365.

The spelling of 3126312989 in words is "three billion, one hundred twenty-six million, three hundred twelve thousand, nine hundred eighty-nine".