145509803 has 2 divisors, whose sum is σ = 145509804. Its totient is φ = 145509802.

The previous prime is 145509773. The next prime is 145509853. The reversal of 145509803 is 308905541.

145509803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145509803 - 2⁶ = 145509739 is a prime.

It is not a weakly prime, because it can be changed into another prime (145509853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72754901 + 72754902.

It is an arithmetic number, because the mean of its divisors is an integer number (72754902).

Almost surely, 2^145509803 is an apocalyptic number.

145509803 is a deficient number, since it is larger than the sum of its proper divisors (1).

145509803 is an equidigital number, since it uses as much as digits as its factorization.

145509803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 145509803 is about 12062.7444223941. The cubic root of 145509803 is about 525.9737670465.

The spelling of 145509803 in words is "one hundred forty-five million, five hundred nine thousand, eight hundred three".