5391665 has 4 divisors (see below), whose sum is σ = 6470004. Its totient is φ = 4313328.

The previous prime is 5391653. The next prime is 5391667. The reversal of 5391665 is 5661935.

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 2093809 + 3297856 = 1447^2 + 1816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5391665 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5391667) 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, 539162 + ... + 539171.

It is an arithmetic number, because the mean of its divisors is an integer number (1617501).

Almost surely, 2^5391665 is an apocalyptic number.

It is an amenable number.

5391665 is a deficient number, since it is larger than the sum of its proper divisors (1078339).

5391665 is a wasteful number, since it uses less digits than its factorization.

5391665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078338.

The product of its digits is 24300, while the sum is 35.

The square root of 5391665 is about 2321.9959086958. The cubic root of 5391665 is about 175.3507523002.

The spelling of 5391665 in words is "five million, three hundred ninety-one thousand, six hundred sixty-five".