994887161 has 4 divisors (see below), whose sum is σ = 997393572. Its totient is φ = 992380752.

The previous prime is 994887133. The next prime is 994887239. The reversal of 994887161 is 161788499.

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 830534761 + 164352400 = 28819^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 994887161 - 2⁶ = 994887097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994887461) 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, 1252610 + ... + 1253403.

It is an arithmetic number, because the mean of its divisors is an integer number (249348393).

Almost surely, 2^994887161 is an apocalyptic number.

It is an amenable number.

994887161 is a deficient number, since it is larger than the sum of its proper divisors (2506411).

994887161 is a wasteful number, since it uses less digits than its factorization.

994887161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506410.

The product of its digits is 870912, while the sum is 53.

The square root of 994887161 is about 31541.8319220682. The cubic root of 994887161 is about 998.2928074856.

The spelling of 994887161 in words is "nine hundred ninety-four million, eight hundred eighty-seven thousand, one hundred sixty-one".