998969431 has 2 divisors, whose sum is σ = 998969432. Its totient is φ = 998969430.

The previous prime is 998969423. The next prime is 998969459. The reversal of 998969431 is 134969899.

998969431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (134969899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998969431 - 2³ = 998969423 is a prime.

It is a super-2 number, since 2×998969431² = 1995879848144927522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998969831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499484715 + 499484716.

It is an arithmetic number, because the mean of its divisors is an integer number (499484716).

Almost surely, 2^998969431 is an apocalyptic number.

998969431 is a deficient number, since it is larger than the sum of its proper divisors (1).

998969431 is an equidigital number, since it uses as much as digits as its factorization.

998969431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 58.

The square root of 998969431 is about 31606.4776746793. The cubic root of 998969431 is about 999.6563589243.

The spelling of 998969431 in words is "nine hundred ninety-eight million, nine hundred sixty-nine thousand, four hundred thirty-one".