145787009 has 2 divisors, whose sum is σ = 145787010. Its totient is φ = 145787008.

The previous prime is 145786961. The next prime is 145787029. The reversal of 145787009 is 900787541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145564225 + 222784 = 12065^2 + 472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145787009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145787029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72893504 + 72893505.

It is an arithmetic number, because the mean of its divisors is an integer number (72893505).

Almost surely, 2^145787009 is an apocalyptic number.

It is an amenable number.

145787009 is a deficient number, since it is larger than the sum of its proper divisors (1).

145787009 is an equidigital number, since it uses as much as digits as its factorization.

145787009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 145787009 is about 12074.2291265323. The cubic root of 145787009 is about 526.3075603505.

The spelling of 145787009 in words is "one hundred forty-five million, seven hundred eighty-seven thousand, nine".