649297 has 8 divisors (see below), whose sum is σ = 719712. Its totient is φ = 580800.

The previous prime is 649291. The next prime is 649307. The reversal of 649297 is 792946.

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

It is not a de Polignac number, because 649297 - 2¹⁵ = 616529 is a prime.

It is a d-powerful number, because it can be written as 6 + 4³ + 2¹⁹ + 9³ + 9⁴ + 7⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (89964).

2⁶⁴⁹²⁹⁷ is an apocalyptic number.

649297 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

649297 is a deficient number, since it is larger than the sum of its proper divisors (70415).

649297 is a wasteful number, since it uses less digits than its factorization.

649297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its digits is 27216, while the sum is 37.

The square root of 649297 is about 805.7896747911. The cubic root of 649297 is about 86.5926702385.

It can be divided in two parts, 649 and 297, that added together give a triangular number (946 = T₄₃).

The spelling of 649297 in words is "six hundred forty-nine thousand, two hundred ninety-seven".