168894749 has 2 divisors, whose sum is σ = 168894750. Its totient is φ = 168894748.

The previous prime is 168894709. The next prime is 168894793. The reversal of 168894749 is 947498861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 57486724 = 10555^2 + 7582^2 .

It is a cyclic number.

It is not a de Polignac number, because 168894749 - 2¹² = 168890653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168894694 and 168894703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168894709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84447374 + 84447375.

It is an arithmetic number, because the mean of its divisors is an integer number (84447375).

Almost surely, 2^168894749 is an apocalyptic number.

It is an amenable number.

168894749 is a deficient number, since it is larger than the sum of its proper divisors (1).

168894749 is an equidigital number, since it uses as much as digits as its factorization.

168894749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The square root of 168894749 is about 12995.9512541407. The cubic root of 168894749 is about 552.7626825668.

The spelling of 168894749 in words is "one hundred sixty-eight million, eight hundred ninety-four thousand, seven hundred forty-nine".