145509853 has 2 divisors, whose sum is σ = 145509854. Its totient is φ = 145509852.

The previous prime is 145509803. The next prime is 145509883. The reversal of 145509853 is 358905541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85710564 + 59799289 = 9258^2 + 7733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145509853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145509803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72754926 + 72754927.

It is an arithmetic number, because the mean of its divisors is an integer number (72754927).

Almost surely, 2^145509853 is an apocalyptic number.

It is an amenable number.

145509853 is a deficient number, since it is larger than the sum of its proper divisors (1).

145509853 is an equidigital number, since it uses as much as digits as its factorization.

145509853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 145509853 is about 12062.7464948908. The cubic root of 145509853 is about 525.9738272915.

The spelling of 145509853 in words is "one hundred forty-five million, five hundred nine thousand, eight hundred fifty-three".