3929491 has 4 divisors (see below), whose sum is σ = 3935272. Its totient is φ = 3923712.

The previous prime is 3929479. The next prime is 3929501. The reversal of 3929491 is 1949293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1949293 = 29 ⋅67217.

It is a cyclic number.

It is not a de Polignac number, because 3929491 - 2⁹ = 3928979 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 3929491.

It is not an unprimeable number, because it can be changed into a prime (3929461) 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, 1710 + ... + 3283.

It is an arithmetic number, because the mean of its divisors is an integer number (983818).

Almost surely, 2^3929491 is an apocalyptic number.

3929491 is a deficient number, since it is larger than the sum of its proper divisors (5781).

3929491 is an equidigital number, since it uses as much as digits as its factorization.

3929491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780.

The product of its digits is 17496, while the sum is 37.

The square root of 3929491 is about 1982.2943777351. The cubic root of 3929491 is about 157.8018533026.

The spelling of 3929491 in words is "three million, nine hundred twenty-nine thousand, four hundred ninety-one".