2381956949 has 2 divisors, whose sum is σ = 2381956950. Its totient is φ = 2381956948.

The previous prime is 2381956891. The next prime is 2381956987. The reversal of 2381956949 is 9496591832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2016459025 + 365497924 = 44905^2 + 19118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2381956949 - 2⁸ = 2381956693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2381956894 and 2381956903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2381956249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190978474 + 1190978475.

It is an arithmetic number, because the mean of its divisors is an integer number (1190978475).

Almost surely, 2^2381956949 is an apocalyptic number.

It is an amenable number.

2381956949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381956949 is an equidigital number, since it uses as much as digits as its factorization.

2381956949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 56.

The square root of 2381956949 is about 48805.2963211986. The cubic root of 2381956949 is about 1335.5022866444.

The spelling of 2381956949 in words is "two billion, three hundred eighty-one million, nine hundred fifty-six thousand, nine hundred forty-nine".