17129947 has 2 divisors, whose sum is σ = 17129948. Its totient is φ = 17129946.

The previous prime is 17129929. The next prime is 17129969. The reversal of 17129947 is 74992171.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17129947 is a prime.

It is not a weakly prime, because it can be changed into another prime (17129447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8564973 + 8564974.

It is an arithmetic number, because the mean of its divisors is an integer number (8564974).

Almost surely, 2^17129947 is an apocalyptic number.

17129947 is a deficient number, since it is larger than the sum of its proper divisors (1).

17129947 is an equidigital number, since it uses as much as digits as its factorization.

17129947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 40.

The square root of 17129947 is about 4138.8340145505. The cubic root of 17129947 is about 257.7816542980.

The spelling of 17129947 in words is "seventeen million, one hundred twenty-nine thousand, nine hundred forty-seven".