123523651 has 2 divisors, whose sum is σ = 123523652. Its totient is φ = 123523650.

The previous prime is 123523637. The next prime is 123523657. The reversal of 123523651 is 156325321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123523651 - 2⁷ = 123523523 is a prime.

It is not a weakly prime, because it can be changed into another prime (123523657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61761825 + 61761826.

It is an arithmetic number, because the mean of its divisors is an integer number (61761826).

Almost surely, 2^123523651 is an apocalyptic number.

123523651 is a deficient number, since it is larger than the sum of its proper divisors (1).

123523651 is an equidigital number, since it uses as much as digits as its factorization.

123523651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 123523651 is about 11114.1194433027. The cubic root of 123523651 is about 498.0237337011.

Adding to 123523651 its reverse (156325321), we get a palindrome (279848972).

The spelling of 123523651 in words is "one hundred twenty-three million, five hundred twenty-three thousand, six hundred fifty-one".