989745460819 has 2 divisors, whose sum is σ = 989745460820. Its totient is φ = 989745460818.

The previous prime is 989745460813. The next prime is 989745460829. The reversal of 989745460819 is 918064547989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989745460819 - 2¹⁵ = 989745428051 is a prime.

It is a super-2 number, since 2×989745460819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989745460813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494872730409 + 494872730410.

It is an arithmetic number, because the mean of its divisors is an integer number (494872730410).

Almost surely, 2^989745460819 is an apocalyptic number.

989745460819 is a deficient number, since it is larger than the sum of its proper divisors (1).

989745460819 is an equidigital number, since it uses as much as digits as its factorization.

989745460819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 989745460819 in words is "nine hundred eighty-nine billion, seven hundred forty-five million, four hundred sixty thousand, eight hundred nineteen".