997829967 has 4 divisors (see below), whose sum is σ = 1330439960. Its totient is φ = 665219976.

The previous prime is 997829929. The next prime is 997829971. The reversal of 997829967 is 769928799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769928799 = 3 ⋅256642933.

It is not a de Polignac number, because 997829967 - 2⁷ = 997829839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997829898 and 997829907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997829167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166304992 + ... + 166304997.

It is an arithmetic number, because the mean of its divisors is an integer number (332609990).

Almost surely, 2^997829967 is an apocalyptic number.

997829967 is a deficient number, since it is larger than the sum of its proper divisors (332609993).

997829967 is a wasteful number, since it uses less digits than its factorization.

997829967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332609992.

The product of its digits is 30862944, while the sum is 66.

The square root of 997829967 is about 31588.4467329434. The cubic root of 997829967 is about 999.2761318079.

The spelling of 997829967 in words is "nine hundred ninety-seven million, eight hundred twenty-nine thousand, nine hundred sixty-seven".