1997717303 has 2 divisors, whose sum is σ = 1997717304. Its totient is φ = 1997717302.

The previous prime is 1997717299. The next prime is 1997717317. The reversal of 1997717303 is 3037177991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1997717303 - 2² = 1997717299 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997717363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998858651 + 998858652.

It is an arithmetic number, because the mean of its divisors is an integer number (998858652).

Almost surely, 2^1997717303 is an apocalyptic number.

1997717303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997717303 is an equidigital number, since it uses as much as digits as its factorization.

1997717303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250047, while the sum is 47.

The square root of 1997717303 is about 44695.8309353344. The cubic root of 1997717303 is about 1259.4415310824.

The spelling of 1997717303 in words is "one billion, nine hundred ninety-seven million, seven hundred seventeen thousand, three hundred three".