42009677 has 2 divisors, whose sum is σ = 42009678. Its totient is φ = 42009676.

The previous prime is 42009647. The next prime is 42009697. The reversal of 42009677 is 77690024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39300361 + 2709316 = 6269^2 + 1646^2 .

It is a cyclic number.

It is not a de Polignac number, because 42009677 - 2⁶ = 42009613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42009647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21004838 + 21004839.

It is an arithmetic number, because the mean of its divisors is an integer number (21004839).

Almost surely, 2^42009677 is an apocalyptic number.

It is an amenable number.

42009677 is a deficient number, since it is larger than the sum of its proper divisors (1).

42009677 is an equidigital number, since it uses as much as digits as its factorization.

42009677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 42009677 is about 6481.4872521667. The cubic root of 42009677 is about 347.6293588750.

The spelling of 42009677 in words is "forty-two million, nine thousand, six hundred seventy-seven".