145670039 has 4 divisors (see below), whose sum is σ = 146083056. Its totient is φ = 145257024.

The previous prime is 145669981. The next prime is 145670051. The reversal of 145670039 is 930076541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930076541 = 43 ⋅21629687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145670039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145669990 and 145670008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145670099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205979 + ... + 206684.

It is an arithmetic number, because the mean of its divisors is an integer number (36520764).

Almost surely, 2^145670039 is an apocalyptic number.

145670039 is a deficient number, since it is larger than the sum of its proper divisors (413017).

145670039 is an equidigital number, since it uses as much as digits as its factorization.

145670039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413016.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 145670039 is about 12069.3843670669. The cubic root of 145670039 is about 526.1667643870.

The spelling of 145670039 in words is "one hundred forty-five million, six hundred seventy thousand, thirty-nine".