290891429 has 2 divisors, whose sum is σ = 290891430. Its totient is φ = 290891428.

The previous prime is 290891423. The next prime is 290891453. The reversal of 290891429 is 924198092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286523329 + 4368100 = 16927^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 290891429 - 2²⁴ = 274114213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 290891429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290891423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145445714 + 145445715.

It is an arithmetic number, because the mean of its divisors is an integer number (145445715).

Almost surely, 2^290891429 is an apocalyptic number.

It is an amenable number.

290891429 is a deficient number, since it is larger than the sum of its proper divisors (1).

290891429 is an equidigital number, since it uses as much as digits as its factorization.

290891429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 290891429 is about 17055.5395399852. The cubic root of 290891429 is about 662.5881152052.

The spelling of 290891429 in words is "two hundred ninety million, eight hundred ninety-one thousand, four hundred twenty-nine".