171012539 has 2 divisors, whose sum is σ = 171012540. Its totient is φ = 171012538.

The previous prime is 171012511. The next prime is 171012563. The reversal of 171012539 is 935210171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171012539 - 2¹⁶ = 170947003 is a prime.

It is not a weakly prime, because it can be changed into another prime (171012139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85506269 + 85506270.

It is an arithmetic number, because the mean of its divisors is an integer number (85506270).

Almost surely, 2^171012539 is an apocalyptic number.

171012539 is a deficient number, since it is larger than the sum of its proper divisors (1).

171012539 is an equidigital number, since it uses as much as digits as its factorization.

171012539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 171012539 is about 13077.1762624811. The cubic root of 171012539 is about 555.0634767643.

The spelling of 171012539 in words is "one hundred seventy-one million, twelve thousand, five hundred thirty-nine".