898394639 has 2 divisors, whose sum is σ = 898394640. Its totient is φ = 898394638.

The previous prime is 898394621. The next prime is 898394647. The reversal of 898394639 is 936493898.

898394639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 898394639 - 2⁸ = 898394383 is a prime.

It is a super-2 number, since 2×898394639² = 1614225854767880642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898394659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449197319 + 449197320.

It is an arithmetic number, because the mean of its divisors is an integer number (449197320).

Almost surely, 2^898394639 is an apocalyptic number.

898394639 is a deficient number, since it is larger than the sum of its proper divisors (1).

898394639 is an equidigital number, since it uses as much as digits as its factorization.

898394639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 59.

The square root of 898394639 is about 29973.2320412731. The cubic root of 898394639 is about 964.9149840538.

The spelling of 898394639 in words is "eight hundred ninety-eight million, three hundred ninety-four thousand, six hundred thirty-nine".