145983503 has 4 divisors (see below), whose sum is σ = 146397408. Its totient is φ = 145569600.

The previous prime is 145983491. The next prime is 145983521. The reversal of 145983503 is 305389541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305389541 = 103 ⋅2964947.

It is a cyclic number.

It is not a de Polignac number, because 145983503 - 2¹⁰ = 145982479 is a prime.

It is a super-3 number, since 3×145983503³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145985503) 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, 206423 + ... + 207128.

It is an arithmetic number, because the mean of its divisors is an integer number (36599352).

Almost surely, 2^145983503 is an apocalyptic number.

145983503 is a deficient number, since it is larger than the sum of its proper divisors (413905).

145983503 is an equidigital number, since it uses as much as digits as its factorization.

145983503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413904.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 145983503 is about 12082.3633035926. The cubic root of 145983503 is about 526.5439093713.

The spelling of 145983503 in words is "one hundred forty-five million, nine hundred eighty-three thousand, five hundred three".