649453 has 4 divisors (see below), whose sum is σ = 742240. Its totient is φ = 556668.

The previous prime is 649427. The next prime is 649457. The reversal of 649453 is 354946.

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: 354946 = 2 ⋅177473.

It is not a de Polignac number, because 649453 - 2⁵ = 649421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649457) 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, 46383 + ... + 46396.

It is an arithmetic number, because the mean of its divisors is an integer number (185560).

2⁶⁴⁹⁴⁵³ is an apocalyptic number.

It is an amenable number.

649453 is a deficient number, since it is larger than the sum of its proper divisors (92787).

649453 is an equidigital number, since it uses as much as digits as its factorization.

649453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92786.

The product of its digits is 12960, while the sum is 31.

The square root of 649453 is about 805.8864684309. The cubic root of 649453 is about 86.5996045972.

The spelling of 649453 in words is "six hundred forty-nine thousand, four hundred fifty-three".