1997790463 has 2 divisors, whose sum is σ = 1997790464. Its totient is φ = 1997790462.

The previous prime is 1997790461. The next prime is 1997790497. The reversal of 1997790463 is 3640977991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1997790463 - 2¹ = 1997790461 is a prime.

Together with 1997790461, 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 (1997790461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998895231 + 998895232.

It is an arithmetic number, because the mean of its divisors is an integer number (998895232).

Almost surely, 2^1997790463 is an apocalyptic number.

1997790463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997790463 is an equidigital number, since it uses as much as digits as its factorization.

1997790463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 1997790463 is about 44696.6493486928. The cubic root of 1997790463 is about 1259.4569052326.

The spelling of 1997790463 in words is "one billion, nine hundred ninety-seven million, seven hundred ninety thousand, four hundred sixty-three".