145603999 has 4 divisors (see below), whose sum is σ = 145670440. Its totient is φ = 145537560.

The previous prime is 145603987. The next prime is 145604023. The reversal of 145603999 is 999306541.

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

It is a cyclic number.

It is not a de Polignac number, because 145603999 - 2⁵ = 145603967 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 (145603919) 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, 29817 + ... + 34354.

It is an arithmetic number, because the mean of its divisors is an integer number (36417610).

Almost surely, 2^145603999 is an apocalyptic number.

145603999 is a deficient number, since it is larger than the sum of its proper divisors (66441).

145603999 is an equidigital number, since it uses as much as digits as its factorization.

145603999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66440.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 145603999 is about 12066.6482090098. The cubic root of 145603999 is about 526.0872392132.

The spelling of 145603999 in words is "one hundred forty-five million, six hundred three thousand, nine hundred ninety-nine".