938994487 has 4 divisors (see below), whose sum is σ = 939323520. Its totient is φ = 938665456.

The previous prime is 938994479. The next prime is 938994491. The reversal of 938994487 is 784499839.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784499839 = 191 ⋅4107329.

It is a cyclic number.

It is not a de Polignac number, because 938994487 - 2³ = 938994479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938994457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160198 + ... + 165955.

It is an arithmetic number, because the mean of its divisors is an integer number (234830880).

Almost surely, 2^938994487 is an apocalyptic number.

938994487 is a deficient number, since it is larger than the sum of its proper divisors (329033).

938994487 is a wasteful number, since it uses less digits than its factorization.

938994487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329032.

The product of its digits is 15676416, while the sum is 61.

The square root of 938994487 is about 30643.0169369793. The cubic root of 938994487 is about 979.2366980817.

The spelling of 938994487 in words is "nine hundred thirty-eight million, nine hundred ninety-four thousand, four hundred eighty-seven".