649022423 has 4 divisors (see below), whose sum is σ = 741739920. Its totient is φ = 556304928.

The previous prime is 649022377. The next prime is 649022477. The reversal of 649022423 is 324220946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649022423 - 2⁶ = 649022359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649022423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649022323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46358738 + ... + 46358751.

It is an arithmetic number, because the mean of its divisors is an integer number (185434980).

Almost surely, 2^649022423 is an apocalyptic number.

649022423 is a deficient number, since it is larger than the sum of its proper divisors (92717497).

649022423 is an equidigital number, since it uses as much as digits as its factorization.

649022423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92717496.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 649022423 is about 25475.9184917836. The cubic root of 649022423 is about 865.8046231318.

The spelling of 649022423 in words is "six hundred forty-nine million, twenty-two thousand, four hundred twenty-three".