168979849 has 2 divisors, whose sum is σ = 168979850. Its totient is φ = 168979848.

The previous prime is 168979841. The next prime is 168979871. The reversal of 168979849 is 948979861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142969849 + 26010000 = 11957^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 168979849 - 2³ = 168979841 is a prime.

It is not a weakly prime, because it can be changed into another prime (168979841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84489924 + 84489925.

It is an arithmetic number, because the mean of its divisors is an integer number (84489925).

Almost surely, 2^168979849 is an apocalyptic number.

It is an amenable number.

168979849 is a deficient number, since it is larger than the sum of its proper divisors (1).

168979849 is an equidigital number, since it uses as much as digits as its factorization.

168979849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 61.

The square root of 168979849 is about 12999.2249384338. The cubic root of 168979849 is about 552.8555060682.

The spelling of 168979849 in words is "one hundred sixty-eight million, nine hundred seventy-nine thousand, eight hundred forty-nine".