145705823 has 2 divisors, whose sum is σ = 145705824. Its totient is φ = 145705822.

The previous prime is 145705811. The next prime is 145705829. The reversal of 145705823 is 328507541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145705823 - 2¹⁸ = 145443679 is a prime.

It is a super-2 number, since 2×145705823² = 42460373712214658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145705829) 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, 72852911 + 72852912.

It is an arithmetic number, because the mean of its divisors is an integer number (72852912).

Almost surely, 2^145705823 is an apocalyptic number.

145705823 is a deficient number, since it is larger than the sum of its proper divisors (1).

145705823 is an equidigital number, since it uses as much as digits as its factorization.

145705823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 145705823 is about 12070.8667045909. The cubic root of 145705823 is about 526.2098453346.

The spelling of 145705823 in words is "one hundred forty-five million, seven hundred five thousand, eight hundred twenty-three".