42769777 has 2 divisors, whose sum is σ = 42769778. Its totient is φ = 42769776.

The previous prime is 42769717. The next prime is 42769787. The reversal of 42769777 is 77796724.

42769777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38142976 + 4626801 = 6176^2 + 2151^2 .

It is a cyclic number.

It is not a de Polignac number, because 42769777 - 2²³ = 34381169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42769777.

It is not a weakly prime, because it can be changed into another prime (42769717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21384888 + 21384889.

It is an arithmetic number, because the mean of its divisors is an integer number (21384889).

Almost surely, 2^42769777 is an apocalyptic number.

It is an amenable number.

42769777 is a deficient number, since it is larger than the sum of its proper divisors (1).

42769777 is an equidigital number, since it uses as much as digits as its factorization.

42769777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1037232, while the sum is 49.

The square root of 42769777 is about 6539.8606254262. The cubic root of 42769777 is about 349.7134443638.

The spelling of 42769777 in words is "forty-two million, seven hundred sixty-nine thousand, seven hundred seventy-seven".