650138023 has 2 divisors, whose sum is σ = 650138024. Its totient is φ = 650138022.

The previous prime is 650138011. The next prime is 650138039. The reversal of 650138023 is 320831056.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650138023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 650137982 and 650138000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650138003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325069011 + 325069012.

It is an arithmetic number, because the mean of its divisors is an integer number (325069012).

Almost surely, 2^650138023 is an apocalyptic number.

650138023 is a deficient number, since it is larger than the sum of its proper divisors (1).

650138023 is an equidigital number, since it uses as much as digits as its factorization.

650138023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 650138023 is about 25497.8042780158. The cubic root of 650138023 is about 866.3004142939.

Adding to 650138023 its reverse (320831056), we get a palindrome (970969079).

The spelling of 650138023 in words is "six hundred fifty million, one hundred thirty-eight thousand, twenty-three".