3121419949 has 2 divisors, whose sum is σ = 3121419950. Its totient is φ = 3121419948.

The previous prime is 3121419947. The next prime is 3121419967. The reversal of 3121419949 is 9499141213.

It is a happy number.

3121419949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3105275625 + 16144324 = 55725^2 + 4018^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121419949 - 2¹ = 3121419947 is a prime.

Together with 3121419947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121419947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560709974 + 1560709975.

It is an arithmetic number, because the mean of its divisors is an integer number (1560709975).

Almost surely, 2^3121419949 is an apocalyptic number.

It is an amenable number.

3121419949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121419949 is an equidigital number, since it uses as much as digits as its factorization.

3121419949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 3121419949 is about 55869.6693117115. The cubic root of 3121419949 is about 1461.4503553645.

The spelling of 3121419949 in words is "three billion, one hundred twenty-one million, four hundred nineteen thousand, nine hundred forty-nine".