145013983 has 4 divisors (see below), whose sum is σ = 145092168. Its totient is φ = 144935800.

The previous prime is 145013977. The next prime is 145013993. The reversal of 145013983 is 389310541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389310541 = 47 ⋅8283203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145013983 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 (145013903) 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, 36241 + ... + 40042.

It is an arithmetic number, because the mean of its divisors is an integer number (36273042).

Almost surely, 2^145013983 is an apocalyptic number.

145013983 is a deficient number, since it is larger than the sum of its proper divisors (78185).

145013983 is an equidigital number, since it uses as much as digits as its factorization.

145013983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78184.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 145013983 is about 12042.1751772676. The cubic root of 145013983 is about 525.3756742741.

The spelling of 145013983 in words is "one hundred forty-five million, thirteen thousand, nine hundred eighty-three".