123451169 has 2 divisors, whose sum is σ = 123451170. Its totient is φ = 123451168.

The previous prime is 123451121. The next prime is 123451171. The reversal of 123451169 is 961154321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62220544 + 61230625 = 7888^2 + 7825^2 .

It is an emirp because it is prime and its reverse (961154321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123451169 - 2¹² = 123447073 is a prime.

It is a super-2 number, since 2×123451169² = 30480382254933122, which contains 22 as substring.

Together with 123451171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123451199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61725584 + 61725585.

It is an arithmetic number, because the mean of its divisors is an integer number (61725585).

Almost surely, 2^123451169 is an apocalyptic number.

It is an amenable number.

123451169 is a deficient number, since it is larger than the sum of its proper divisors (1).

123451169 is an equidigital number, since it uses as much as digits as its factorization.

123451169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 123451169 is about 11110.8581576762. The cubic root of 123451169 is about 497.9263034551.

The spelling of 123451169 in words is "one hundred twenty-three million, four hundred fifty-one thousand, one hundred sixty-nine".