145787549 has 2 divisors, whose sum is σ = 145787550. Its totient is φ = 145787548.

The previous prime is 145787519. The next prime is 145787557. The reversal of 145787549 is 945787541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83850649 + 61936900 = 9157^2 + 7870^2 .

It is an emirp because it is prime and its reverse (945787541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145787549 - 2⁸ = 145787293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145787497 and 145787506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145787519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72893774 + 72893775.

It is an arithmetic number, because the mean of its divisors is an integer number (72893775).

Almost surely, 2^145787549 is an apocalyptic number.

It is an amenable number.

145787549 is a deficient number, since it is larger than the sum of its proper divisors (1).

145787549 is an equidigital number, since it uses as much as digits as its factorization.

145787549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 50.

The square root of 145787549 is about 12074.2514881876. The cubic root of 145787549 is about 526.3082101700.

The spelling of 145787549 in words is "one hundred forty-five million, seven hundred eighty-seven thousand, five hundred forty-nine".