3932391 has 4 divisors (see below), whose sum is σ = 5243192. Its totient is φ = 2621592.

The previous prime is 3932387. The next prime is 3932399. The reversal of 3932391 is 1932393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1932393 = 3 ⋅644131.

It is not a de Polignac number, because 3932391 - 2² = 3932387 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3932399) 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, 655396 + ... + 655401.

It is an arithmetic number, because the mean of its divisors is an integer number (1310798).

Almost surely, 2^3932391 is an apocalyptic number.

3932391 is a deficient number, since it is larger than the sum of its proper divisors (1310801).

3932391 is a wasteful number, since it uses less digits than its factorization.

3932391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310800.

The product of its digits is 4374, while the sum is 30.

The square root of 3932391 is about 1983.0257184414. The cubic root of 3932391 is about 157.8406634898.

The spelling of 3932391 in words is "three million, nine hundred thirty-two thousand, three hundred ninety-one".