1990707947 has 2 divisors, whose sum is σ = 1990707948. Its totient is φ = 1990707946.

The previous prime is 1990707941. The next prime is 1990707949. The reversal of 1990707947 is 7497070991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990707947 - 2¹⁰ = 1990706923 is a prime.

Together with 1990707949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1990707941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995353973 + 995353974.

It is an arithmetic number, because the mean of its divisors is an integer number (995353974).

Almost surely, 2^1990707947 is an apocalyptic number.

1990707947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990707947 is an equidigital number, since it uses as much as digits as its factorization.

1990707947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The square root of 1990707947 is about 44617.3502911143. The cubic root of 1990707947 is about 1257.9668114197.

The spelling of 1990707947 in words is "one billion, nine hundred ninety million, seven hundred seven thousand, nine hundred forty-seven".