938422691 has 4 divisors (see below), whose sum is σ = 951639984. Its totient is φ = 925205400.

The previous prime is 938422679. The next prime is 938422721. The reversal of 938422691 is 196224839.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-938422691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (938422621) 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 3 ways as a sum of consecutive naturals, for example, 6608540 + ... + 6608681.

It is an arithmetic number, because the mean of its divisors is an integer number (237909996).

Almost surely, 2^938422691 is an apocalyptic number.

938422691 is a deficient number, since it is larger than the sum of its proper divisors (13217293).

938422691 is a wasteful number, since it uses less digits than its factorization.

938422691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217292.

The product of its digits is 186624, while the sum is 44.

The square root of 938422691 is about 30633.6855601803. The cubic root of 938422691 is about 979.0378906242.

The spelling of 938422691 in words is "nine hundred thirty-eight million, four hundred twenty-two thousand, six hundred ninety-one".