5403991 has 4 divisors (see below), whose sum is σ = 5464800. Its totient is φ = 5343184.

The previous prime is 5403989. The next prime is 5403997. The reversal of 5403991 is 1993045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1993045 = 5 ⋅398609.

It is a cyclic number.

It is not a de Polignac number, because 5403991 - 2¹ = 5403989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5403997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30271 + ... + 30448.

It is an arithmetic number, because the mean of its divisors is an integer number (1366200).

Almost surely, 2^5403991 is an apocalyptic number.

5403991 is a deficient number, since it is larger than the sum of its proper divisors (60809).

5403991 is an equidigital number, since it uses as much as digits as its factorization.

5403991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60808.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 5403991 is about 2324.6485755916. The cubic root of 5403991 is about 175.4842749633.

The spelling of 5403991 in words is "five million, four hundred three thousand, nine hundred ninety-one".