145999823 has 2 divisors, whose sum is σ = 145999824. Its totient is φ = 145999822.

The previous prime is 145999787. The next prime is 145999831. The reversal of 145999823 is 328999541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145999823 - 2¹⁸ = 145737679 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145999123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72999911 + 72999912.

It is an arithmetic number, because the mean of its divisors is an integer number (72999912).

Almost surely, 2^145999823 is an apocalyptic number.

145999823 is a deficient number, since it is larger than the sum of its proper divisors (1).

145999823 is an equidigital number, since it uses as much as digits as its factorization.

145999823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 145999823 is about 12083.0386492802. The cubic root of 145999823 is about 526.5635300276.

The spelling of 145999823 in words is "one hundred forty-five million, nine hundred ninety-nine thousand, eight hundred twenty-three".