42691717 has 2 divisors, whose sum is σ = 42691718. Its totient is φ = 42691716.

The previous prime is 42691711. The next prime is 42691723. The reversal of 42691717 is 71719624.

It is a balanced prime because it is at equal distance from previous prime (42691711) and next prime (42691723).

It can be written as a sum of positive squares in only one way, i.e., 42588676 + 103041 = 6526^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 42691717 - 2²³ = 34303109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42691711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21345858 + 21345859.

It is an arithmetic number, because the mean of its divisors is an integer number (21345859).

Almost surely, 2^42691717 is an apocalyptic number.

It is an amenable number.

42691717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42691717 is an equidigital number, since it uses as much as digits as its factorization.

42691717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 42691717 is about 6533.8898827574. The cubic root of 42691717 is about 349.5005583961.

The spelling of 42691717 in words is "forty-two million, six hundred ninety-one thousand, seven hundred seventeen".