145071983 has 4 divisors (see below), whose sum is σ = 165796560. Its totient is φ = 124347408.

The previous prime is 145071977. The next prime is 145071989. The reversal of 145071983 is 389170541.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (145071977) and next prime (145071989).

It is a cyclic number.

It is not a de Polignac number, because 145071983 - 2⁶ = 145071919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145071989) 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 in 3 ways as a sum of consecutive naturals, for example, 10362278 + ... + 10362291.

It is an arithmetic number, because the mean of its divisors is an integer number (41449140).

Almost surely, 2^145071983 is an apocalyptic number.

145071983 is a deficient number, since it is larger than the sum of its proper divisors (20724577).

145071983 is an equidigital number, since it uses as much as digits as its factorization.

145071983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20724576.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 145071983 is about 12044.5831393203. The cubic root of 145071983 is about 525.4457082733.

The spelling of 145071983 in words is "one hundred forty-five million, seventy-one thousand, nine hundred eighty-three".