170240639 has 2 divisors, whose sum is σ = 170240640. Its totient is φ = 170240638.

The previous prime is 170240617. The next prime is 170240677. The reversal of 170240639 is 936042071.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170240639 is a prime.

It is a Sophie Germain 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 (170240039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85120319 + 85120320.

It is an arithmetic number, because the mean of its divisors is an integer number (85120320).

Almost surely, 2^170240639 is an apocalyptic number.

170240639 is a deficient number, since it is larger than the sum of its proper divisors (1).

170240639 is an equidigital number, since it uses as much as digits as its factorization.

170240639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 170240639 is about 13047.6296314695. The cubic root of 170240639 is about 554.2270863276.

The spelling of 170240639 in words is "one hundred seventy million, two hundred forty thousand, six hundred thirty-nine".