145249823 has 2 divisors, whose sum is σ = 145249824. Its totient is φ = 145249822.

The previous prime is 145249781. The next prime is 145249843. The reversal of 145249823 is 328942541.

It is a strong prime.

It is an emirp because it is prime and its reverse (328942541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145249823 - 2⁸ = 145249567 is a prime.

It is a super-2 number, since 2×145249823² = 42195022163062658, which contains 22 as substring.

It is equal to p_8191838 and since 145249823 and 8191838 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145249843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72624911 + 72624912.

It is an arithmetic number, because the mean of its divisors is an integer number (72624912).

Almost surely, 2^145249823 is an apocalyptic number.

145249823 is a deficient number, since it is larger than the sum of its proper divisors (1).

145249823 is an equidigital number, since it uses as much as digits as its factorization.

145249823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 145249823 is about 12051.9634499944. The cubic root of 145249823 is about 525.6603307082.

The spelling of 145249823 in words is "one hundred forty-five million, two hundred forty-nine thousand, eight hundred twenty-three".