994012538 has 4 divisors (see below), whose sum is σ = 1491018810. Its totient is φ = 497006268.

The previous prime is 994012519. The next prime is 994012571. The reversal of 994012538 is 835210499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835210499 = 137 ⋅6096427.

It can be written as a sum of positive squares in only one way, i.e., 871843729 + 122168809 = 29527^2 + 11053^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 994012495 and 994012504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248503133 + ... + 248503136.

Almost surely, 2^994012538 is an apocalyptic number.

994012538 is a deficient number, since it is larger than the sum of its proper divisors (497006272).

994012538 is a wasteful number, since it uses less digits than its factorization.

994012538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497006271.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 994012538 is about 31527.9643808477. The cubic root of 994012538 is about 998.0001827302. Note that the first 3 decimals are identical.

The spelling of 994012538 in words is "nine hundred ninety-four million, twelve thousand, five hundred thirty-eight".