145763809 has 4 divisors (see below), whose sum is σ = 146088900. Its totient is φ = 145438720.

The previous prime is 145763777. The next prime is 145763861. The reversal of 145763809 is 908367541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87011584 + 58752225 = 9328^2 + 7665^2 .

It is a cyclic number.

It is not a de Polignac number, because 145763809 - 2⁵ = 145763777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145763909) 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, 161872 + ... + 162769.

It is an arithmetic number, because the mean of its divisors is an integer number (36522225).

Almost surely, 2^145763809 is an apocalyptic number.

It is an amenable number.

145763809 is a deficient number, since it is larger than the sum of its proper divisors (325091).

145763809 is an equidigital number, since it uses as much as digits as its factorization.

145763809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325090.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 145763809 is about 12073.2683644488. The cubic root of 145763809 is about 526.2796406630.

The spelling of 145763809 in words is "one hundred forty-five million, seven hundred sixty-three thousand, eight hundred nine".