2403391 has 8 divisors (see below), whose sum is σ = 2474064. Its totient is φ = 2333760.

The previous prime is 2403389. The next prime is 2403403. The reversal of 2403391 is 1933042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2403391 - 2¹ = 2403389 is a prime.

It is a Duffinian number.

2403391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7096 + ... + 7426.

It is an arithmetic number, because the mean of its divisors is an integer number (309258).

2^2403391 is an apocalyptic number.

2403391 is a deficient number, since it is larger than the sum of its proper divisors (70673).

2403391 is a wasteful number, since it uses less digits than its factorization.

2403391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2403391 is about 1550.2873927114. The cubic root of 2403391 is about 133.9496172065.

The spelling of 2403391 in words is "two million, four hundred three thousand, three hundred ninety-one".