890389397 has 2 divisors, whose sum is σ = 890389398. Its totient is φ = 890389396.

The previous prime is 890389373. The next prime is 890389427. The reversal of 890389397 is 793983098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 884824516 + 5564881 = 29746^2 + 2359^2 .

It is a cyclic number.

It is not a de Polignac number, because 890389397 - 2⁸ = 890389141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890389597) 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, 445194698 + 445194699.

It is an arithmetic number, because the mean of its divisors is an integer number (445194699).

Almost surely, 2^890389397 is an apocalyptic number.

It is an amenable number.

890389397 is a deficient number, since it is larger than the sum of its proper divisors (1).

890389397 is an equidigital number, since it uses as much as digits as its factorization.

890389397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 890389397 is about 29839.3933752012. The cubic root of 890389397 is about 962.0404361874.

The spelling of 890389397 in words is "eight hundred ninety million, three hundred eighty-nine thousand, three hundred ninety-seven".