997943429 has 4 divisors (see below), whose sum is σ = 1140506784. Its totient is φ = 855380076.

The previous prime is 997943423. The next prime is 997943431. The reversal of 997943429 is 924349799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 997943429 - 2⁸ = 997943173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997943423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71281667 + ... + 71281680.

It is an arithmetic number, because the mean of its divisors is an integer number (285126696).

Almost surely, 2^997943429 is an apocalyptic number.

It is an amenable number.

997943429 is a deficient number, since it is larger than the sum of its proper divisors (142563355).

997943429 is a wasteful number, since it uses less digits than its factorization.

997943429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142563354.

The product of its digits is 4408992, while the sum is 56.

The square root of 997943429 is about 31590.2426233165. The cubic root of 997943429 is about 999.3140058530.

The spelling of 997943429 in words is "nine hundred ninety-seven million, nine hundred forty-three thousand, four hundred twenty-nine".