3878913 has 4 divisors (see below), whose sum is σ = 5171888. Its totient is φ = 2585940.

The previous prime is 3878899. The next prime is 3878921. The reversal of 3878913 is 3198783.

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 not a de Polignac number, because 3878913 - 2⁸ = 3878657 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878923) 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, 646483 + ... + 646488.

It is an arithmetic number, because the mean of its divisors is an integer number (1292972).

It is a Proth number, since it is equal to 947 ⋅ 2¹² + 1 and 947 < 2¹².

Almost surely, 2^3878913 is an apocalyptic number.

It is an amenable number.

3878913 is a deficient number, since it is larger than the sum of its proper divisors (1292975).

3878913 is a wasteful number, since it uses less digits than its factorization.

3878913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292974.

The product of its digits is 36288, while the sum is 39.

The square root of 3878913 is about 1969.4956207110. The cubic root of 3878913 is about 157.1218846076.

The spelling of 3878913 in words is "three million, eight hundred seventy-eight thousand, nine hundred thirteen".