994891538 has 4 divisors (see below), whose sum is σ = 1492337310. Its totient is φ = 497445768.

The previous prime is 994891507. The next prime is 994891549. The reversal of 994891538 is 835198499.

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

It can be written as a sum of positive squares in only one way, i.e., 685025929 + 309865609 = 26173^2 + 17603^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248722883 + ... + 248722886.

Almost surely, 2^994891538 is an apocalyptic number.

994891538 is a deficient number, since it is larger than the sum of its proper divisors (497445772).

994891538 is a wasteful number, since it uses less digits than its factorization.

994891538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497445771.

The product of its digits is 2799360, while the sum is 56.

The square root of 994891538 is about 31541.9013060405. The cubic root of 994891538 is about 998.2942714778.

The spelling of 994891538 in words is "nine hundred ninety-four million, eight hundred ninety-one thousand, five hundred thirty-eight".