290468639 has 2 divisors, whose sum is σ = 290468640. Its totient is φ = 290468638.

The previous prime is 290468617. The next prime is 290468657. The reversal of 290468639 is 936864092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290468639 - 2²⁴ = 273691423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 290468593 and 290468602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290468609) 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 as a sum of consecutive naturals, namely, 145234319 + 145234320.

It is an arithmetic number, because the mean of its divisors is an integer number (145234320).

Almost surely, 2^290468639 is an apocalyptic number.

290468639 is a deficient number, since it is larger than the sum of its proper divisors (1).

290468639 is an equidigital number, since it uses as much as digits as its factorization.

290468639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 290468639 is about 17043.1405263232. The cubic root of 290468639 is about 662.2669513274.

The spelling of 290468639 in words is "two hundred ninety million, four hundred sixty-eight thousand, six hundred thirty-nine".