6998431 has 8 divisors (see below), whose sum is σ = 7676928. Its totient is φ = 6327000.

The previous prime is 6998423. The next prime is 6998447. The reversal of 6998431 is 1348996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6998431 - 2³ = 6998423 is a prime.

It is a super-2 number, since 2×6998431² = 97956072923522, which contains 22 as substring.

It is a Duffinian number.

6998431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6998401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (959616).

Almost surely, 2^6998431 is an apocalyptic number.

6998431 is a deficient number, since it is larger than the sum of its proper divisors (678497).

6998431 is a wasteful number, since it uses less digits than its factorization.

6998431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533.

The product of its digits is 46656, while the sum is 40.

The square root of 6998431 is about 2645.4547813183. The cubic root of 6998431 is about 191.2788248806.

The spelling of 6998431 in words is "six million, nine hundred ninety-eight thousand, four hundred thirty-one".