994189729 has 4 divisors (see below), whose sum is σ = 1070665876. Its totient is φ = 917713584.

The previous prime is 994189723. The next prime is 994189813. The reversal of 994189729 is 927981499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927981499 = 17 ⋅54587147.

It can be written as a sum of positive squares in 2 ways, for example, as 277289104 + 716900625 = 16652^2 + 26775^2 .

It is a cyclic number.

It is not a de Polignac number, because 994189729 - 2⁷ = 994189601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994189723) 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, 38238054 + ... + 38238079.

It is an arithmetic number, because the mean of its divisors is an integer number (267666469).

Almost surely, 2^994189729 is an apocalyptic number.

It is an amenable number.

994189729 is a deficient number, since it is larger than the sum of its proper divisors (76476147).

994189729 is a wasteful number, since it uses less digits than its factorization.

994189729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76476146.

The product of its digits is 2939328, while the sum is 58.

The square root of 994189729 is about 31530.7743165308. The cubic root of 994189729 is about 998.0594798172.

The spelling of 994189729 in words is "nine hundred ninety-four million, one hundred eighty-nine thousand, seven hundred twenty-nine".