3918938917 has 4 divisors (see below), whose sum is σ = 4125198880. Its totient is φ = 3712678956.

The previous prime is 3918938899. The next prime is 3918938939. The reversal of 3918938917 is 7198398193.

It is a happy number.

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 3918938917 - 2¹¹ = 3918936869 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 (3918938977) 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, 103129953 + ... + 103129990.

It is an arithmetic number, because the mean of its divisors is an integer number (1031299720).

Almost surely, 2^3918938917 is an apocalyptic number.

It is an amenable number.

3918938917 is a deficient number, since it is larger than the sum of its proper divisors (206259963).

3918938917 is a wasteful number, since it uses less digits than its factorization.

3918938917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206259962.

The product of its digits is 2939328, while the sum is 58.

The square root of 3918938917 is about 62601.4290332098. The cubic root of 3918938917 is about 1576.6047528208.

The spelling of 3918938917 in words is "three billion, nine hundred eighteen million, nine hundred thirty-eight thousand, nine hundred seventeen".