17142991 has 2 divisors, whose sum is σ = 17142992. Its totient is φ = 17142990.

The previous prime is 17142977. The next prime is 17143003. The reversal of 17142991 is 19924171.

It is a strong prime.

It is an emirp because it is prime and its reverse (19924171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17142991 - 2¹⁷ = 17011919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17142901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8571495 + 8571496.

It is an arithmetic number, because the mean of its divisors is an integer number (8571496).

Almost surely, 2^17142991 is an apocalyptic number.

17142991 is a deficient number, since it is larger than the sum of its proper divisors (1).

17142991 is an equidigital number, since it uses as much as digits as its factorization.

17142991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 34.

The square root of 17142991 is about 4140.4095208083. The cubic root of 17142991 is about 257.8470689930.

The spelling of 17142991 in words is "seventeen million, one hundred forty-two thousand, nine hundred ninety-one".