123651629 has 2 divisors, whose sum is σ = 123651630. Its totient is φ = 123651628.

The previous prime is 123651607. The next prime is 123651721. The reversal of 123651629 is 926156321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 996004 = 11075^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 123651629 - 2¹⁶ = 123586093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123651329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61825814 + 61825815.

It is an arithmetic number, because the mean of its divisors is an integer number (61825815).

Almost surely, 2^123651629 is an apocalyptic number.

It is an amenable number.

123651629 is a deficient number, since it is larger than the sum of its proper divisors (1).

123651629 is an equidigital number, since it uses as much as digits as its factorization.

123651629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 123651629 is about 11119.8754039782. The cubic root of 123651629 is about 498.1956686087.

The spelling of 123651629 in words is "one hundred twenty-three million, six hundred fifty-one thousand, six hundred twenty-nine".