997484897 has 2 divisors, whose sum is σ = 997484898. Its totient is φ = 997484896.

The previous prime is 997484879. The next prime is 997484909. The reversal of 997484897 is 798484799.

Together with previous prime (997484879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500685376 + 496799521 = 22376^2 + 22289^2 .

It is a cyclic number.

It is not a de Polignac number, because 997484897 - 2⁸ = 997484641 is a prime.

It is a super-2 number, since 2×997484897² = 1989952239486201218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (997484827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498742448 + 498742449.

It is an arithmetic number, because the mean of its divisors is an integer number (498742449).

Almost surely, 2^997484897 is an apocalyptic number.

It is an amenable number.

997484897 is a deficient number, since it is larger than the sum of its proper divisors (1).

997484897 is an equidigital number, since it uses as much as digits as its factorization.

997484897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 65.

The square root of 997484897 is about 31582.9842953449. The cubic root of 997484897 is about 999.1609284892.

The spelling of 997484897 in words is "nine hundred ninety-seven million, four hundred eighty-four thousand, eight hundred ninety-seven".