42168977 has 2 divisors, whose sum is σ = 42168978. Its totient is φ = 42168976.

The previous prime is 42168947. The next prime is 42169007. The reversal of 42168977 is 77986124.

It is a balanced prime because it is at equal distance from previous prime (42168947) and next prime (42169007).

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 14753281 = 5236^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 42168977 - 2¹⁰ = 42167953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42168947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21084488 + 21084489.

It is an arithmetic number, because the mean of its divisors is an integer number (21084489).

Almost surely, 2^42168977 is an apocalyptic number.

It is an amenable number.

42168977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42168977 is an equidigital number, since it uses as much as digits as its factorization.

42168977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 42168977 is about 6493.7644706287. The cubic root of 42168977 is about 348.0682062329.

The spelling of 42168977 in words is "forty-two million, one hundred sixty-eight thousand, nine hundred seventy-seven".