649023 has 8 divisors (see below), whose sum is σ = 883968. Its totient is φ = 423384.

The previous prime is 649007. The next prime is 649039. The reversal of 649023 is 320946.

It is an interprime number because it is at equal distance from previous prime (649007) and next prime (649039).

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

It is not a de Polignac number, because 649023 - 2⁴ = 649007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648984 and 649002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649063) 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, 2161 + ... + 2442.

It is an arithmetic number, because the mean of its divisors is an integer number (110496).

2⁶⁴⁹⁰²³ is an apocalyptic number.

649023 is a deficient number, since it is larger than the sum of its proper divisors (234945).

649023 is a wasteful number, since it uses less digits than its factorization.

649023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 649023 is about 805.6196372979. The cubic root of 649023 is about 86.5804879707.

Adding to 649023 its reverse (320946), we get a palindrome (969969).

The spelling of 649023 in words is "six hundred forty-nine thousand, twenty-three".