290021273 has 2 divisors, whose sum is σ = 290021274. Its totient is φ = 290021272.

The previous prime is 290021261. The next prime is 290021279. The reversal of 290021273 is 372120092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152967424 + 137053849 = 12368^2 + 11707^2 .

It is a cyclic number.

It is not a de Polignac number, because 290021273 - 2⁶ = 290021209 is a prime.

It is a super-2 number, since 2×290021273² = 168224677585081058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (290021279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145010636 + 145010637.

It is an arithmetic number, because the mean of its divisors is an integer number (145010637).

Almost surely, 2^290021273 is an apocalyptic number.

It is an amenable number.

290021273 is a deficient number, since it is larger than the sum of its proper divisors (1).

290021273 is an equidigital number, since it uses as much as digits as its factorization.

290021273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 290021273 is about 17030.0109512590. The cubic root of 290021273 is about 661.9267792622.

The spelling of 290021273 in words is "two hundred ninety million, twenty-one thousand, two hundred seventy-three".