445406123 has 2 divisors, whose sum is σ = 445406124. Its totient is φ = 445406122.

The previous prime is 445406081. The next prime is 445406131. The reversal of 445406123 is 321604544.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445406123 is a prime.

It is a super-2 number, since 2×445406123² = 396773228811782258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445406153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222703061 + 222703062.

It is an arithmetic number, because the mean of its divisors is an integer number (222703062).

Almost surely, 2^445406123 is an apocalyptic number.

445406123 is a deficient number, since it is larger than the sum of its proper divisors (1).

445406123 is an equidigital number, since it uses as much as digits as its factorization.

445406123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 445406123 is about 21104.6469527448. The cubic root of 445406123 is about 763.6928554172.

The spelling of 445406123 in words is "four hundred forty-five million, four hundred six thousand, one hundred twenty-three".