997494431 has 8 divisors (see below), whose sum is σ = 1058111280. Its totient is φ = 937093248.

The previous prime is 997494427. The next prime is 997494437. The reversal of 997494431 is 134494799.

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 997494431 - 2² = 997494427 is a prime.

It is a super-2 number, since 2×997494431² = 1989990279752027522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 997494431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997494437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44336 + ... + 62933.

It is an arithmetic number, because the mean of its divisors is an integer number (132263910).

Almost surely, 2^997494431 is an apocalyptic number.

997494431 is a deficient number, since it is larger than the sum of its proper divisors (60616849).

997494431 is a wasteful number, since it uses less digits than its factorization.

997494431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107833.

The product of its digits is 979776, while the sum is 50.

The square root of 997494431 is about 31583.1352306892. The cubic root of 997494431 is about 999.1641118190.

The spelling of 997494431 in words is "nine hundred ninety-seven million, four hundred ninety-four thousand, four hundred thirty-one".