3123331994 has 4 divisors (see below), whose sum is σ = 4684997994. Its totient is φ = 1561665996.

The previous prime is 3123331973. The next prime is 3123331997. The reversal of 3123331994 is 4991333213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4991333213 = 47 ⋅106198579.

It can be written as a sum of positive squares in only one way, i.e., 1779742969 + 1343589025 = 42187^2 + 36655^2 .

It is not an unprimeable number, because it can be changed into a prime (3123331997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780832997 + ... + 780833000.

Almost surely, 2^3123331994 is an apocalyptic number.

3123331994 is a deficient number, since it is larger than the sum of its proper divisors (1561666000).

3123331994 is a wasteful number, since it uses less digits than its factorization.

3123331994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561665999.

The product of its digits is 52488, while the sum is 38.

The square root of 3123331994 is about 55886.7783469400. The cubic root of 3123331994 is about 1461.7487012580.

The spelling of 3123331994 in words is "three billion, one hundred twenty-three million, three hundred thirty-one thousand, nine hundred ninety-four".