3874665909 has 4 divisors (see below), whose sum is σ = 5166221216. Its totient is φ = 2583110604.

The previous prime is 3874665841. The next prime is 3874665911. The reversal of 3874665909 is 9095664783.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9095664783 = 3 ⋅3031888261.

It is not a de Polignac number, because 3874665909 - 2¹⁷ = 3874534837 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 (3874665989) 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, 645777649 + ... + 645777654.

It is an arithmetic number, because the mean of its divisors is an integer number (1291555304).

Almost surely, 2^3874665909 is an apocalyptic number.

It is an amenable number.

3874665909 is a deficient number, since it is larger than the sum of its proper divisors (1291555307).

3874665909 is a wasteful number, since it uses less digits than its factorization.

3874665909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291555306.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The square root of 3874665909 is about 62246.8144486125. The cubic root of 3874665909 is about 1570.6451848122.

The spelling of 3874665909 in words is "three billion, eight hundred seventy-four million, six hundred sixty-five thousand, nine hundred nine".