997859459 has 2 divisors, whose sum is σ = 997859460. Its totient is φ = 997859458.

The previous prime is 997859441. The next prime is 997859477. The reversal of 997859459 is 954958799.

It is a balanced prime because it is at equal distance from previous prime (997859441) and next prime (997859477).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997859459 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 997859395 and 997859404.

It is not a weakly prime, because it can be changed into another prime (997859959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498929729 + 498929730.

It is an arithmetic number, because the mean of its divisors is an integer number (498929730).

Almost surely, 2^997859459 is an apocalyptic number.

997859459 is a deficient number, since it is larger than the sum of its proper divisors (1).

997859459 is an equidigital number, since it uses as much as digits as its factorization.

997859459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36741600, while the sum is 65.

The square root of 997859459 is about 31588.9135457363. The cubic root of 997859459 is about 999.2859766253.

The spelling of 997859459 in words is "nine hundred ninety-seven million, eight hundred fifty-nine thousand, four hundred fifty-nine".