2931887242 has 4 divisors (see below), whose sum is σ = 4397830866. Its totient is φ = 1465943620.

The previous prime is 2931887239. The next prime is 2931887249. The reversal of 2931887242 is 2427881392.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2557426041 + 374461201 = 50571^2 + 19351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2931887192 and 2931887201.

It is not an unprimeable number, because it can be changed into a prime (2931887249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 732971809 + ... + 732971812.

Almost surely, 2^2931887242 is an apocalyptic number.

2931887242 is a deficient number, since it is larger than the sum of its proper divisors (1465943624).

2931887242 is a wasteful number, since it uses less digits than its factorization.

2931887242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465943623.

The product of its digits is 387072, while the sum is 46.

The square root of 2931887242 is about 54146.9042697734. The cubic root of 2931887242 is about 1431.2508399606.

The spelling of 2931887242 in words is "two billion, nine hundred thirty-one million, eight hundred eighty-seven thousand, two hundred forty-two".