123453445 has 4 divisors (see below), whose sum is σ = 148144140. Its totient is φ = 98762752.

The previous prime is 123453389. The next prime is 123453457. The reversal of 123453445 is 544354321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544354321 = 7 ⋅77764903.

It can be written as a sum of positive squares in 2 ways, for example, as 95922436 + 27531009 = 9794^2 + 5247^2 .

It is a cyclic number.

It is not a de Polignac number, because 123453445 - 2¹⁷ = 123322373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12345340 + ... + 12345349.

It is an arithmetic number, because the mean of its divisors is an integer number (37036035).

Almost surely, 2^123453445 is an apocalyptic number.

It is an amenable number.

123453445 is a deficient number, since it is larger than the sum of its proper divisors (24690695).

123453445 is an equidigital number, since it uses as much as digits as its factorization.

123453445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24690694.

The product of its digits is 28800, while the sum is 31.

The square root of 123453445 is about 11110.9605795359. The cubic root of 123453445 is about 497.9293634323.

The spelling of 123453445 in words is "one hundred twenty-three million, four hundred fifty-three thousand, four hundred forty-five".