145666847 has 2 divisors, whose sum is σ = 145666848. Its totient is φ = 145666846.

The previous prime is 145666793. The next prime is 145666849. The reversal of 145666847 is 748666541.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145666847 is a prime.

Together with 145666849, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 145666847 parts by 17068 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145666849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72833423 + 72833424.

It is an arithmetic number, because the mean of its divisors is an integer number (72833424).

Almost surely, 2^145666847 is an apocalyptic number.

145666847 is a deficient number, since it is larger than the sum of its proper divisors (1).

145666847 is an equidigital number, since it uses as much as digits as its factorization.

145666847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 145666847 is about 12069.2521309317. The cubic root of 145666847 is about 526.1629211428.

The spelling of 145666847 in words is "one hundred forty-five million, six hundred sixty-six thousand, eight hundred forty-seven".