3945144867 has 4 divisors (see below), whose sum is σ = 5260193160. Its totient is φ = 2630096576.

The previous prime is 3945144829. The next prime is 3945144881. The reversal of 3945144867 is 7684415493.

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 3945144867 - 2⁸ = 3945144611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3945144887) 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, 657524142 + ... + 657524147.

It is an arithmetic number, because the mean of its divisors is an integer number (1315048290).

Almost surely, 2^3945144867 is an apocalyptic number.

3945144867 is a deficient number, since it is larger than the sum of its proper divisors (1315048293).

3945144867 is a wasteful number, since it uses less digits than its factorization.

3945144867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315048292.

The product of its digits is 2903040, while the sum is 51.

The square root of 3945144867 is about 62810.3882092763. The cubic root of 3945144867 is about 1580.1112012478. Note that the first 3 decimals are identical.

The spelling of 3945144867 in words is "three billion, nine hundred forty-five million, one hundred forty-four thousand, eight hundred sixty-seven".