9997431 has 8 divisors (see below), whose sum is σ = 13789680. Its totient is φ = 6435072.

The previous prime is 9997397. The next prime is 9997441. The reversal of 9997431 is 1347999.

9997431 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9997431 - 2⁶ = 9997367 is a prime.

It is a super-2 number, since 2×9997431² = 199897253199522, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997441) 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, 57370 + ... + 57543.

It is an arithmetic number, because the mean of its divisors is an integer number (1723710).

Almost surely, 2^9997431 is an apocalyptic number.

9997431 is a deficient number, since it is larger than the sum of its proper divisors (3792249).

9997431 is a wasteful number, since it uses less digits than its factorization.

9997431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114945.

The product of its digits is 61236, while the sum is 42.

The square root of 9997431 is about 3161.8714395117. The cubic root of 9997431 is about 215.4250182807.

The spelling of 9997431 in words is "nine million, nine hundred ninety-seven thousand, four hundred thirty-one".