168804997 has 2 divisors, whose sum is σ = 168804998. Its totient is φ = 168804996.

The previous prime is 168804991. The next prime is 168805001. The reversal of 168804997 is 799408861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161137636 + 7667361 = 12694^2 + 2769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168804997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168804991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84402498 + 84402499.

It is an arithmetic number, because the mean of its divisors is an integer number (84402499).

Almost surely, 2^168804997 is an apocalyptic number.

It is an amenable number.

168804997 is a deficient number, since it is larger than the sum of its proper divisors (1).

168804997 is an equidigital number, since it uses as much as digits as its factorization.

168804997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 168804997 is about 12992.4977198382. The cubic root of 168804997 is about 552.6647510697.

The spelling of 168804997 in words is "one hundred sixty-eight million, eight hundred four thousand, nine hundred ninety-seven".