145990023 has 4 divisors (see below), whose sum is σ = 194653368. Its totient is φ = 97326680.

The previous prime is 145990007. The next prime is 145990027. The reversal of 145990023 is 320099541.

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 145990023 - 2⁴ = 145990007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145990027) 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 in 3 ways as a sum of consecutive naturals, for example, 24331668 + ... + 24331673.

It is an arithmetic number, because the mean of its divisors is an integer number (48663342).

Almost surely, 2^145990023 is an apocalyptic number.

145990023 is a deficient number, since it is larger than the sum of its proper divisors (48663345).

145990023 is an equidigital number, since it uses as much as digits as its factorization.

145990023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48663344.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 145990023 is about 12082.6331153437. The cubic root of 145990023 is about 526.5517481913.

The spelling of 145990023 in words is "one hundred forty-five million, nine hundred ninety thousand, twenty-three".