168499957 has 2 divisors, whose sum is σ = 168499958. Its totient is φ = 168499956.

The previous prime is 168499927. The next prime is 168499993. The reversal of 168499957 is 759994861.

168499957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167081476 + 1418481 = 12926^2 + 1191^2 .

It is an emirp because it is prime and its reverse (759994861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168499957 - 2⁷ = 168499829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168499927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84249978 + 84249979.

It is an arithmetic number, because the mean of its divisors is an integer number (84249979).

Almost surely, 2^168499957 is an apocalyptic number.

It is an amenable number.

168499957 is a deficient number, since it is larger than the sum of its proper divisors (1).

168499957 is an equidigital number, since it uses as much as digits as its factorization.

168499957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The square root of 168499957 is about 12980.7533294489. The cubic root of 168499957 is about 552.3316517181.

The spelling of 168499957 in words is "one hundred sixty-eight million, four hundred ninety-nine thousand, nine hundred fifty-seven".