6510997 has 4 divisors (see below), whose sum is σ = 6633900. Its totient is φ = 6388096.

The previous prime is 6510967. The next prime is 6511003. The reversal of 6510997 is 7990156.

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 3818116 + 2692881 = 1954^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 6510997 - 2⁷ = 6510869 is a prime.

It is a Duffinian number.

6510997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6510967) 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, 61372 + ... + 61477.

It is an arithmetic number, because the mean of its divisors is an integer number (1658475).

Almost surely, 2^6510997 is an apocalyptic number.

It is an amenable number.

6510997 is a deficient number, since it is larger than the sum of its proper divisors (122903).

6510997 is a wasteful number, since it uses less digits than its factorization.

6510997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122902.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 6510997 is about 2551.6655345088. The cubic root of 6510997 is about 186.7307457866.

The spelling of 6510997 in words is "six million, five hundred ten thousand, nine hundred ninety-seven".