123523969 has 2 divisors, whose sum is σ = 123523970. Its totient is φ = 123523968.

The previous prime is 123523949. The next prime is 123523987. The reversal of 123523969 is 969325321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106812225 + 16711744 = 10335^2 + 4088^2 .

It is a cyclic number.

It is not a de Polignac number, because 123523969 - 2¹⁵ = 123491201 is a prime.

It is a super-2 number, since 2×123523969² = 30516341835025922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123523919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61761984 + 61761985.

It is an arithmetic number, because the mean of its divisors is an integer number (61761985).

Almost surely, 2^123523969 is an apocalyptic number.

It is an amenable number.

123523969 is a deficient number, since it is larger than the sum of its proper divisors (1).

123523969 is an equidigital number, since it uses as much as digits as its factorization.

123523969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 123523969 is about 11114.1337494201. The cubic root of 123523969 is about 498.0241610725.

The spelling of 123523969 in words is "one hundred twenty-three million, five hundred twenty-three thousand, nine hundred sixty-nine".