997411819 has 4 divisors (see below), whose sum is σ = 1031805360. Its totient is φ = 963018280.

The previous prime is 997411817. The next prime is 997411843. The reversal of 997411819 is 918114799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997411819 - 2¹ = 997411817 is a prime.

It is a super-2 number, since 2×997411819² = 1989660673361777522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997411817) 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, 17196727 + ... + 17196784.

It is an arithmetic number, because the mean of its divisors is an integer number (257951340).

Almost surely, 2^997411819 is an apocalyptic number.

997411819 is a deficient number, since it is larger than the sum of its proper divisors (34393541).

997411819 is a wasteful number, since it uses less digits than its factorization.

997411819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34393540.

The product of its digits is 163296, while the sum is 49.

The square root of 997411819 is about 31581.8273537172. The cubic root of 997411819 is about 999.1365276301.

The spelling of 997411819 in words is "nine hundred ninety-seven million, four hundred eleven thousand, eight hundred nineteen".