997116061 has 2 divisors, whose sum is σ = 997116062. Its totient is φ = 997116060.

The previous prime is 997116049. The next prime is 997116103. The reversal of 997116061 is 160611799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880605625 + 116510436 = 29675^2 + 10794^2 .

It is a cyclic number.

It is not a de Polignac number, because 997116061 - 2⁹ = 997115549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997116031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498558030 + 498558031.

It is an arithmetic number, because the mean of its divisors is an integer number (498558031).

Almost surely, 2^997116061 is an apocalyptic number.

It is an amenable number.

997116061 is a deficient number, since it is larger than the sum of its proper divisors (1).

997116061 is an equidigital number, since it uses as much as digits as its factorization.

997116061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 997116061 is about 31577.1445985859. The cubic root of 997116061 is about 999.0377613938.

The spelling of 997116061 in words is "nine hundred ninety-seven million, one hundred sixteen thousand, sixty-one".