290997971 has 8 divisors (see below), whose sum is σ = 322833600. Its totient is φ = 260059240.

The previous prime is 290997947. The next prime is 290997991. The reversal of 290997971 is 179799092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 290997971 - 2¹⁰ = 290996947 is a prime.

It is a super-2 number, since 2×290997971² = 169359638252233682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290997911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223541 + ... + 224838.

It is an arithmetic number, because the mean of its divisors is an integer number (40354200).

Almost surely, 2^290997971 is an apocalyptic number.

290997971 is a deficient number, since it is larger than the sum of its proper divisors (31835629).

290997971 is a wasteful number, since it uses less digits than its factorization.

290997971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448449.

The product of its (nonzero) digits is 642978, while the sum is 53.

The square root of 290997971 is about 17058.6626380851. The cubic root of 290997971 is about 662.6689985854.

The spelling of 290997971 in words is "two hundred ninety million, nine hundred ninety-seven thousand, nine hundred seventy-one".