145152809 has 2 divisors, whose sum is σ = 145152810. Its totient is φ = 145152808.

The previous prime is 145152731. The next prime is 145152823. The reversal of 145152809 is 908251541.

145152809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 2111209 = 11960^2 + 1453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145152809 is a prime.

It is a super-3 number, since 3×145152809³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145152899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72576404 + 72576405.

It is an arithmetic number, because the mean of its divisors is an integer number (72576405).

Almost surely, 2^145152809 is an apocalyptic number.

It is an amenable number.

145152809 is a deficient number, since it is larger than the sum of its proper divisors (1).

145152809 is an equidigital number, since it uses as much as digits as its factorization.

145152809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 145152809 is about 12047.9379563476. The cubic root of 145152809 is about 525.5432731491.

The spelling of 145152809 in words is "one hundred forty-five million, one hundred fifty-two thousand, eight hundred nine".