5491649 has 4 divisors (see below), whose sum is σ = 5515860. Its totient is φ = 5467440.

The previous prime is 5491639. The next prime is 5491657. The reversal of 5491649 is 9461945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2050624 + 3441025 = 1432^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 5491649 - 2⁸ = 5491393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5491609) 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, 11762 + ... + 12219.

It is an arithmetic number, because the mean of its divisors is an integer number (1378965).

Almost surely, 2^5491649 is an apocalyptic number.

It is an amenable number.

5491649 is a deficient number, since it is larger than the sum of its proper divisors (24211).

5491649 is a wasteful number, since it uses less digits than its factorization.

5491649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210.

The product of its digits is 38880, while the sum is 38.

The square root of 5491649 is about 2343.4267643773. The cubic root of 5491649 is about 176.4280323027.

The spelling of 5491649 in words is "five million, four hundred ninety-one thousand, six hundred forty-nine".