994887131 has 12 divisors (see below), whose sum is σ = 1159222680. Its totient is φ = 851356800.

The previous prime is 994887097. The next prime is 994887133. The reversal of 994887131 is 131788499.

It is a de Polignac number, because none of the positive numbers 2^k-994887131 is a prime.

It is a super-2 number, since 2×994887131² = 1979600806858822322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 994887131.

It is not an unprimeable number, because it can be changed into a prime (994887133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13931 + ... + 46731.

It is an arithmetic number, because the mean of its divisors is an integer number (96601890).

Almost surely, 2^994887131 is an apocalyptic number.

994887131 is a deficient number, since it is larger than the sum of its proper divisors (164335549).

994887131 is a wasteful number, since it uses less digits than its factorization.

994887131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33434 (or 33427 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 994887131 is about 31541.8314465093. The cubic root of 994887131 is about 998.2927974514.

It can be divided in two parts, 9948 and 87131, that added together give a palindrome (97079).

The spelling of 994887131 in words is "nine hundred ninety-four million, eight hundred eighty-seven thousand, one hundred thirty-one".