145330649 has 2 divisors, whose sum is σ = 145330650. Its totient is φ = 145330648.

The previous prime is 145330613. The next prime is 145330651. The reversal of 145330649 is 946033541.

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., 82810000 + 62520649 = 9100^2 + 7907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145330649 is a prime.

It is a super-2 number, since 2×145330649² = 42241995077522402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 145330651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145333649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665324 + 72665325.

It is an arithmetic number, because the mean of its divisors is an integer number (72665325).

Almost surely, 2^145330649 is an apocalyptic number.

It is an amenable number.

145330649 is a deficient number, since it is larger than the sum of its proper divisors (1).

145330649 is an equidigital number, since it uses as much as digits as its factorization.

145330649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 145330649 is about 12055.3162131899. The cubic root of 145330649 is about 525.7578159527.

The spelling of 145330649 in words is "one hundred forty-five million, three hundred thirty thousand, six hundred forty-nine".