2145393923 has 2 divisors, whose sum is σ = 2145393924. Its totient is φ = 2145393922.

The previous prime is 2145393919. The next prime is 2145393937. The reversal of 2145393923 is 3293935412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145393923 - 2² = 2145393919 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145353923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072696961 + 1072696962.

It is an arithmetic number, because the mean of its divisors is an integer number (1072696962).

Almost surely, 2^2145393923 is an apocalyptic number.

2145393923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145393923 is an equidigital number, since it uses as much as digits as its factorization.

2145393923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 41.

The square root of 2145393923 is about 46318.3972412690. The cubic root of 2145393923 is about 1289.7405329161.

The spelling of 2145393923 in words is "two billion, one hundred forty-five million, three hundred ninety-three thousand, nine hundred twenty-three".