938896921 has 8 divisors (see below), whose sum is σ = 944501760. Its totient is φ = 933306528.

The previous prime is 938896891. The next prime is 938896949. The reversal of 938896921 is 129698839.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 938896921 - 2¹⁵ = 938864153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (938896991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144280 + ... + 150646.

It is an arithmetic number, because the mean of its divisors is an integer number (118062720).

Almost surely, 2^938896921 is an apocalyptic number.

It is an amenable number.

938896921 is a deficient number, since it is larger than the sum of its proper divisors (5604839).

938896921 is a wasteful number, since it uses less digits than its factorization.

938896921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223.

The product of its digits is 1679616, while the sum is 55.

The square root of 938896921 is about 30641.4249179114. The cubic root of 938896921 is about 979.2027811212.

The spelling of 938896921 in words is "nine hundred thirty-eight million, eight hundred ninety-six thousand, nine hundred twenty-one".