938913819 has 4 divisors (see below), whose sum is σ = 1251885096. Its totient is φ = 625942544.

The previous prime is 938913799. The next prime is 938913821. The reversal of 938913819 is 918319839.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 938913819 - 2⁷ = 938913691 is a prime.

It is a super-2 number, since 2×938913819² = 1763118319018329522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (938913119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156485634 + ... + 156485639.

It is an arithmetic number, because the mean of its divisors is an integer number (312971274).

Almost surely, 2^938913819 is an apocalyptic number.

938913819 is a deficient number, since it is larger than the sum of its proper divisors (312971277).

938913819 is a wasteful number, since it uses less digits than its factorization.

938913819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312971276.

The product of its digits is 419904, while the sum is 51.

The square root of 938913819 is about 30641.7006545002. The cubic root of 938913819 is about 979.2086555571.

The spelling of 938913819 in words is "nine hundred thirty-eight million, nine hundred thirteen thousand, eight hundred nineteen".