1981962347 has 2 divisors, whose sum is σ = 1981962348. Its totient is φ = 1981962346.

The previous prime is 1981962343. The next prime is 1981962361. The reversal of 1981962347 is 7432691891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1981962347 - 2² = 1981962343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1981962295 and 1981962304.

It is not a weakly prime, because it can be changed into another prime (1981962343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990981173 + 990981174.

It is an arithmetic number, because the mean of its divisors is an integer number (990981174).

Almost surely, 2^1981962347 is an apocalyptic number.

1981962347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1981962347 is an equidigital number, since it uses as much as digits as its factorization.

1981962347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 1981962347 is about 44519.2356964942. The cubic root of 1981962347 is about 1256.1219359335.

The spelling of 1981962347 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-two thousand, three hundred forty-seven".