290512409 has 6 divisors (see below), whose sum is σ = 319323690. Its totient is φ = 264102080.

The previous prime is 290512361. The next prime is 290512433. The reversal of 290512409 is 904215092.

It can be written as a sum of positive squares in only one way, i.e., 213072409 + 77440000 = 14597^2 + 8800^2 .

It is not a de Polignac number, because 290512409 - 2²⁴ = 273735193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290512009) 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 5 ways as a sum of consecutive naturals, for example, 1200344 + ... + 1200585.

It is an arithmetic number, because the mean of its divisors is an integer number (53220615).

Almost surely, 2^290512409 is an apocalyptic number.

It is an amenable number.

290512409 is a deficient number, since it is larger than the sum of its proper divisors (28811281).

290512409 is a wasteful number, since it uses less digits than its factorization.

290512409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400951 (or 2400940 counting only the distinct ones).

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

The square root of 290512409 is about 17044.4245722758. The cubic root of 290512409 is about 662.3002147791.

The spelling of 290512409 in words is "two hundred ninety million, five hundred twelve thousand, four hundred nine".