3965401439 has 4 divisors (see below), whose sum is σ = 3965714160. Its totient is φ = 3965088720.

The previous prime is 3965401423. The next prime is 3965401493. The reversal of 3965401439 is 9341045693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9341045693 = 7 ⋅1334435099.

It is a cyclic number.

It is not a de Polignac number, because 3965401439 - 2⁴ = 3965401423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3965401439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965401409) 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, 136499 + ... + 162980.

It is an arithmetic number, because the mean of its divisors is an integer number (991428540).

Almost surely, 2^3965401439 is an apocalyptic number.

3965401439 is a deficient number, since it is larger than the sum of its proper divisors (312721).

3965401439 is a wasteful number, since it uses less digits than its factorization.

3965401439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312720.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 3965401439 is about 62971.4335155235. The cubic root of 3965401439 is about 1582.8109762410.

The spelling of 3965401439 in words is "three billion, nine hundred sixty-five million, four hundred one thousand, four hundred thirty-nine".