997113841 has 2 divisors, whose sum is σ = 997113842. Its totient is φ = 997113840.

The previous prime is 997113839. The next prime is 997113911. The reversal of 997113841 is 148311799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 890425600 + 106688241 = 29840^2 + 10329^2 .

It is a cyclic number.

It is not a de Polignac number, because 997113841 - 2¹ = 997113839 is a prime.

Together with 997113839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (997113041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498556920 + 498556921.

It is an arithmetic number, because the mean of its divisors is an integer number (498556921).

Almost surely, 2^997113841 is an apocalyptic number.

It is an amenable number.

997113841 is a deficient number, since it is larger than the sum of its proper divisors (1).

997113841 is an equidigital number, since it uses as much as digits as its factorization.

997113841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 997113841 is about 31577.1094465595. The cubic root of 997113841 is about 999.0370199671.

The spelling of 997113841 in words is "nine hundred ninety-seven million, one hundred thirteen thousand, eight hundred forty-one".