1945423123 has 4 divisors (see below), whose sum is σ = 2223340720. Its totient is φ = 1667505528.

The previous prime is 1945423097. The next prime is 1945423127. The reversal of 1945423123 is 3213245491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1945423123 - 2²¹ = 1943325971 is a prime.

It is a super-2 number, since 2×1945423123² = 7569342255006146258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945423127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138958788 + ... + 138958801.

It is an arithmetic number, because the mean of its divisors is an integer number (555835180).

Almost surely, 2^1945423123 is an apocalyptic number.

1945423123 is a deficient number, since it is larger than the sum of its proper divisors (277917597).

1945423123 is an equidigital number, since it uses as much as digits as its factorization.

1945423123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277917596.

The product of its digits is 25920, while the sum is 34.

The square root of 1945423123 is about 44106.9509601378. The cubic root of 1945423123 is about 1248.3547684272.

The spelling of 1945423123 in words is "one billion, nine hundred forty-five million, four hundred twenty-three thousand, one hundred twenty-three".