6490657 has 4 divisors (see below), whose sum is σ = 6540336. Its totient is φ = 6440980.

The previous prime is 6490643. The next prime is 6490661. The reversal of 6490657 is 7560946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7560946 = 2 ⋅3780473.

It is a cyclic number.

It is not a de Polignac number, because 6490657 - 2¹¹ = 6488609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6490667) 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, 24643 + ... + 24904.

It is an arithmetic number, because the mean of its divisors is an integer number (1635084).

Almost surely, 2^6490657 is an apocalyptic number.

It is an amenable number.

6490657 is a deficient number, since it is larger than the sum of its proper divisors (49679).

6490657 is a wasteful number, since it uses less digits than its factorization.

6490657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49678.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6490657 is about 2547.6767848375. The cubic root of 6490657 is about 186.5360973956.

The spelling of 6490657 in words is "six million, four hundred ninety thousand, six hundred fifty-seven".