989000431 has 2 divisors, whose sum is σ = 989000432. Its totient is φ = 989000430.

The previous prime is 989000413. The next prime is 989000443. The reversal of 989000431 is 134000989.

Together with previous prime (989000413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (134000989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989000431 - 2¹⁷ = 988869359 is a prime.

It is a super-2 number, since 2×989000431² = 1956243705036371522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989000231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494500215 + 494500216.

It is an arithmetic number, because the mean of its divisors is an integer number (494500216).

Almost surely, 2^989000431 is an apocalyptic number.

989000431 is a deficient number, since it is larger than the sum of its proper divisors (1).

989000431 is an equidigital number, since it uses as much as digits as its factorization.

989000431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 989000431 is about 31448.3772395334. The cubic root of 989000431 is about 996.3199508509.

The spelling of 989000431 in words is "nine hundred eighty-nine million, four hundred thirty-one", and thus it is an aban number.