42173959 has 2 divisors, whose sum is σ = 42173960. Its totient is φ = 42173958.

The previous prime is 42173941. The next prime is 42174007. The reversal of 42173959 is 95937124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42173959 - 2²¹ = 40076807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42173059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21086979 + 21086980.

It is an arithmetic number, because the mean of its divisors is an integer number (21086980).

Almost surely, 2^42173959 is an apocalyptic number.

42173959 is a deficient number, since it is larger than the sum of its proper divisors (1).

42173959 is an equidigital number, since it uses as much as digits as its factorization.

42173959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 42173959 is about 6494.1480580597. The cubic root of 42173959 is about 348.0819130512.

The spelling of 42173959 in words is "forty-two million, one hundred seventy-three thousand, nine hundred fifty-nine".