938870989 has 4 divisors (see below), whose sum is σ = 1072995424. Its totient is φ = 804746556.

The previous prime is 938870983. The next prime is 938871029. The reversal of 938870989 is 989078839.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 938870989 - 2⁵ = 938870957 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 (938870983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67062207 + ... + 67062220.

It is an arithmetic number, because the mean of its divisors is an integer number (268248856).

Almost surely, 2^938870989 is an apocalyptic number.

It is an amenable number.

938870989 is a deficient number, since it is larger than the sum of its proper divisors (134124435).

938870989 is a wasteful number, since it uses less digits than its factorization.

938870989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134124434.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 938870989 is about 30641.0017623445. The cubic root of 938870989 is about 979.1937659603.

The spelling of 938870989 in words is "nine hundred thirty-eight million, eight hundred seventy thousand, nine hundred eighty-nine".