42171677 has 2 divisors, whose sum is σ = 42171678. Its totient is φ = 42171676.

The previous prime is 42171631. The next prime is 42171707. The reversal of 42171677 is 77617124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22714756 + 19456921 = 4766^2 + 4411^2 .

It is a cyclic number.

It is not a de Polignac number, because 42171677 - 2⁸ = 42171421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42171617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085838 + 21085839.

It is an arithmetic number, because the mean of its divisors is an integer number (21085839).

Almost surely, 2^42171677 is an apocalyptic number.

It is an amenable number.

42171677 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171677 is an equidigital number, since it uses as much as digits as its factorization.

42171677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 35.

The square root of 42171677 is about 6493.9723590419. The cubic root of 42171677 is about 348.0756347911.

The spelling of 42171677 in words is "forty-two million, one hundred seventy-one thousand, six hundred seventy-seven".