939619649 has 4 divisors (see below), whose sum is σ = 942826836. Its totient is φ = 936412464.

The previous prime is 939619619. The next prime is 939619679. The reversal of 939619649 is 946916939.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946916939 = 311 ⋅3044749.

It is an interprime number because it is at equal distance from previous prime (939619619) and next prime (939619679).

It can be written as a sum of positive squares in 2 ways, for example, as 576336049 + 363283600 = 24007^2 + 19060^2 .

It is a cyclic number.

It is not a de Polignac number, because 939619649 - 2¹² = 939615553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 939619594 and 939619603.

It is not an unprimeable number, because it can be changed into a prime (939619619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603154 + ... + 1603739.

It is an arithmetic number, because the mean of its divisors is an integer number (235706709).

Almost surely, 2^939619649 is an apocalyptic number.

It is an amenable number.

939619649 is a deficient number, since it is larger than the sum of its proper divisors (3207187).

939619649 is a wasteful number, since it uses less digits than its factorization.

939619649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207186.

The product of its digits is 2834352, while the sum is 56.

The square root of 939619649 is about 30653.2159650501. The cubic root of 939619649 is about 979.4539679991.

The spelling of 939619649 in words is "nine hundred thirty-nine million, six hundred nineteen thousand, six hundred forty-nine".