290197066 has 4 divisors (see below), whose sum is σ = 435295602. Its totient is φ = 145098532.

The previous prime is 290197009. The next prime is 290197079. The reversal of 290197066 is 660791092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 222875041 + 67322025 = 14929^2 + 8205^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72549265 + ... + 72549268.

Almost surely, 2^290197066 is an apocalyptic number.

290197066 is a deficient number, since it is larger than the sum of its proper divisors (145098536).

290197066 is a wasteful number, since it uses less digits than its factorization.

290197066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145098535.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 290197066 is about 17035.1714402879. The cubic root of 290197066 is about 662.0604919729.

The spelling of 290197066 in words is "two hundred ninety million, one hundred ninety-seven thousand, sixty-six".