145923239 has 16 divisors (see below), whose sum is σ = 182393856. Its totient is φ = 113416800.

The previous prime is 145923181. The next prime is 145923241. The reversal of 145923239 is 932329541.

It is a happy number.

145923239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-145923239 is a prime.

It is a super-2 number, since 2×145923239² = 42587183360502242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145923259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30989 + ... + 35385.

It is an arithmetic number, because the mean of its divisors is an integer number (11399616).

Almost surely, 2^145923239 is an apocalyptic number.

145923239 is a deficient number, since it is larger than the sum of its proper divisors (36470617).

145923239 is a wasteful number, since it uses less digits than its factorization.

145923239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846.

The product of its digits is 58320, while the sum is 38.

The square root of 145923239 is about 12079.8691631987. The cubic root of 145923239 is about 526.4714445404.

The spelling of 145923239 in words is "one hundred forty-five million, nine hundred twenty-three thousand, two hundred thirty-nine".