17129891 has 2 divisors, whose sum is σ = 17129892. Its totient is φ = 17129890.

The previous prime is 17129881. The next prime is 17129899. The reversal of 17129891 is 19892171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17129891 - 2¹⁴ = 17113507 is a prime.

It is not a weakly prime, because it can be changed into another prime (17129899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8564945 + 8564946.

It is an arithmetic number, because the mean of its divisors is an integer number (8564946).

Almost surely, 2^17129891 is an apocalyptic number.

17129891 is a deficient number, since it is larger than the sum of its proper divisors (1).

17129891 is an equidigital number, since it uses as much as digits as its factorization.

17129891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 38.

The square root of 17129891 is about 4138.8272493546. The cubic root of 17129891 is about 257.7813733906.

The spelling of 17129891 in words is "seventeen million, one hundred twenty-nine thousand, eight hundred ninety-one".