2491927 has 4 divisors (see below), whose sum is σ = 2495376. Its totient is φ = 2488480.

The previous prime is 2491903. The next prime is 2491933. The reversal of 2491927 is 7291942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2491927 - 2¹⁹ = 1967639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2491892 and 2491901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491967) 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, 178 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (623844).

2^2491927 is an apocalyptic number.

2491927 is a deficient number, since it is larger than the sum of its proper divisors (3449).

2491927 is a wasteful number, since it uses less digits than its factorization.

2491927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448.

The product of its digits is 9072, while the sum is 34.

The square root of 2491927 is about 1578.5838590332. The cubic root of 2491927 is about 135.5746333397.

The spelling of 2491927 in words is "two million, four hundred ninety-one thousand, nine hundred twenty-seven".