17990149 has 2 divisors, whose sum is σ = 17990150. Its totient is φ = 17990148.

The previous prime is 17990113. The next prime is 17990153. The reversal of 17990149 is 94109971.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14493249 + 3496900 = 3807^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 17990149 - 2¹¹ = 17988101 is a prime.

It is a super-2 number, since 2×17990149² = 647290922084402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17990249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8995074 + 8995075.

It is an arithmetic number, because the mean of its divisors is an integer number (8995075).

Almost surely, 2^17990149 is an apocalyptic number.

It is an amenable number.

17990149 is a deficient number, since it is larger than the sum of its proper divisors (1).

17990149 is an equidigital number, since it uses as much as digits as its factorization.

17990149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 17990149 is about 4241.4795767515. The cubic root of 17990149 is about 262.0263215791.

The spelling of 17990149 in words is "seventeen million, nine hundred ninety thousand, one hundred forty-nine".