6539694 has 16 divisors (see below), whose sum is σ = 14947968. Its totient is φ = 1868472.

The previous prime is 6539681. The next prime is 6539707. The reversal of 6539694 is 4969356.

It is an interprime number because it is at equal distance from previous prime (6539681) and next prime (6539707).

It is a super-2 number, since 2×6539694² = 85535195227272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 155707 = 6539694 / (6 + 5 + 3 + 9 + 6 + 9 + 4).

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 77812 + ... + 77895.

It is an arithmetic number, because the mean of its divisors is an integer number (934248).

Almost surely, 2^6539694 is an apocalyptic number.

6539694 is an abundant number, since it is smaller than the sum of its proper divisors (8408274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6539694 is a wasteful number, since it uses less digits than its factorization.

6539694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155719.

The product of its digits is 174960, while the sum is 42.

The square root of 6539694 is about 2557.2825420747. The cubic root of 6539694 is about 187.0046802188.

The spelling of 6539694 in words is "six million, five hundred thirty-nine thousand, six hundred ninety-four".