997113553 has 2 divisors, whose sum is σ = 997113554. Its totient is φ = 997113552.

The previous prime is 997113527. The next prime is 997113577. The reversal of 997113553 is 355311799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544615569 + 452497984 = 23337^2 + 21272^2 .

It is a cyclic number.

It is not a de Polignac number, because 997113553 - 2⁹ = 997113041 is a prime.

It is not a weakly prime, because it can be changed into another prime (997110553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498556776 + 498556777.

It is an arithmetic number, because the mean of its divisors is an integer number (498556777).

Almost surely, 2^997113553 is an apocalyptic number.

It is an amenable number.

997113553 is a deficient number, since it is larger than the sum of its proper divisors (1).

997113553 is an equidigital number, since it uses as much as digits as its factorization.

997113553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127575, while the sum is 43.

The square root of 997113553 is about 31577.1048862938. The cubic root of 997113553 is about 999.0369237820.

The spelling of 997113553 in words is "nine hundred ninety-seven million, one hundred thirteen thousand, five hundred fifty-three".