7042171687 has 2 divisors, whose sum is σ = 7042171688. Its totient is φ = 7042171686.

The previous prime is 7042171667. The next prime is 7042171691. The reversal of 7042171687 is 7861712407.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7042171687 - 2⁷ = 7042171559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7042171607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521085843 + 3521085844.

It is an arithmetic number, because the mean of its divisors is an integer number (3521085844).

Almost surely, 2^7042171687 is an apocalyptic number.

7042171687 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042171687 is an equidigital number, since it uses as much as digits as its factorization.

7042171687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 7042171687 is about 83917.6482451695. The cubic root of 7042171687 is about 1916.7649957502.

The spelling of 7042171687 in words is "seven billion, forty-two million, one hundred seventy-one thousand, six hundred eighty-seven".