997485899 has 2 divisors, whose sum is σ = 997485900. Its totient is φ = 997485898.

The previous prime is 997485871. The next prime is 997485901. The reversal of 997485899 is 998584799.

It is a strong prime.

It is an emirp because it is prime and its reverse (998584799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997485899 - 2¹² = 997481803 is a prime.

Together with 997485901, 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 (997485809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498742949 + 498742950.

It is an arithmetic number, because the mean of its divisors is an integer number (498742950).

Almost surely, 2^997485899 is an apocalyptic number.

997485899 is a deficient number, since it is larger than the sum of its proper divisors (1).

997485899 is an equidigital number, since it uses as much as digits as its factorization.

997485899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 68.

The square root of 997485899 is about 31583.0001583130. Note that the first 3 decimals coincide. The cubic root of 997485899 is about 999.1612630503.

The spelling of 997485899 in words is "nine hundred ninety-seven million, four hundred eighty-five thousand, eight hundred ninety-nine".