290516261 has 8 divisors (see below), whose sum is σ = 335442240. Its totient is φ = 246446208.

The previous prime is 290516257. The next prime is 290516269. The reversal of 290516261 is 162615092.

It is a happy number.

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 290516261 - 2² = 290516257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290516269) 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, 213251 + ... + 214608.

It is an arithmetic number, because the mean of its divisors is an integer number (41930280).

Almost surely, 2^290516261 is an apocalyptic number.

It is an amenable number.

290516261 is a deficient number, since it is larger than the sum of its proper divisors (44925979).

290516261 is an equidigital number, since it uses as much as digits as its factorization.

290516261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427963.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 290516261 is about 17044.5375707292. The cubic root of 290516261 is about 662.3031419852.

The spelling of 290516261 in words is "two hundred ninety million, five hundred sixteen thousand, two hundred sixty-one".