650631623 has 2 divisors, whose sum is σ = 650631624. Its totient is φ = 650631622.

The previous prime is 650631607. The next prime is 650631677. The reversal of 650631623 is 326136056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 650631623 - 2⁴ = 650631607 is a prime.

It is a super-2 number, since 2×650631623² = 846643017695228258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 650631623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650633623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325315811 + 325315812.

It is an arithmetic number, because the mean of its divisors is an integer number (325315812).

Almost surely, 2^650631623 is an apocalyptic number.

650631623 is a deficient number, since it is larger than the sum of its proper divisors (1).

650631623 is an equidigital number, since it uses as much as digits as its factorization.

650631623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 650631623 is about 25507.4817063543. The cubic root of 650631623 is about 866.5195973488.

Adding to 650631623 its reverse (326136056), we get a palindrome (976767679).

The spelling of 650631623 in words is "six hundred fifty million, six hundred thirty-one thousand, six hundred twenty-three".