6539690 has 8 divisors (see below), whose sum is σ = 11771460. Its totient is φ = 2615872.

The previous prime is 6539681. The next prime is 6539707. The reversal of 6539690 is 969356.

It can be written as a sum of positive squares in 2 ways, for example, as 6195121 + 344569 = 2489^2 + 587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6539690² = 85535090592200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326975 + ... + 326994.

Almost surely, 2^6539690 is an apocalyptic number.

6539690 is a deficient number, since it is larger than the sum of its proper divisors (5231770).

6539690 is a wasteful number, since it uses less digits than its factorization.

6539690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653976.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 6539690 is about 2557.2817599944. The cubic root of 6539690 is about 187.0046420917.

The spelling of 6539690 in words is "six million, five hundred thirty-nine thousand, six hundred ninety".