890443397 has 2 divisors, whose sum is σ = 890443398. Its totient is φ = 890443396.

The previous prime is 890443387. The next prime is 890443423. The reversal of 890443397 is 793344098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885717121 + 4726276 = 29761^2 + 2174^2 .

It is a cyclic number.

It is not a de Polignac number, because 890443397 - 2⁴ = 890443381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890443327) 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, 445221698 + 445221699.

It is an arithmetic number, because the mean of its divisors is an integer number (445221699).

Almost surely, 2^890443397 is an apocalyptic number.

It is an amenable number.

890443397 is a deficient number, since it is larger than the sum of its proper divisors (1).

890443397 is an equidigital number, since it uses as much as digits as its factorization.

890443397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 890443397 is about 29840.2982056145. The cubic root of 890443397 is about 962.0598842827.

The spelling of 890443397 in words is "eight hundred ninety million, four hundred forty-three thousand, three hundred ninety-seven".