994567997 has 4 divisors (see below), whose sum is σ = 1001243100. Its totient is φ = 987892896.

The previous prime is 994567991. The next prime is 994568011. The reversal of 994567997 is 799765499.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64866916 + 929701081 = 8054^2 + 30491^2 .

It is a cyclic number.

It is not a de Polignac number, because 994567997 - 2¹⁰ = 994566973 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 (994567991) 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, 3337328 + ... + 3337625.

It is an arithmetic number, because the mean of its divisors is an integer number (250310775).

Almost surely, 2^994567997 is an apocalyptic number.

It is an amenable number.

994567997 is a deficient number, since it is larger than the sum of its proper divisors (6675103).

994567997 is a wasteful number, since it uses less digits than its factorization.

994567997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675102.

The product of its digits is 38578680, while the sum is 65.

The square root of 994567997 is about 31536.7721398370. The cubic root of 994567997 is about 998.1860438861.

The spelling of 994567997 in words is "nine hundred ninety-four million, five hundred sixty-seven thousand, nine hundred ninety-seven".