145565647 has 2 divisors, whose sum is σ = 145565648. Its totient is φ = 145565646.

The previous prime is 145565639. The next prime is 145565653. The reversal of 145565647 is 746565541.

It is a strong prime.

It is an emirp because it is prime and its reverse (746565541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145565647 - 2³ = 145565639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145565617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72782823 + 72782824.

It is an arithmetic number, because the mean of its divisors is an integer number (72782824).

Almost surely, 2^145565647 is an apocalyptic number.

145565647 is a deficient number, since it is larger than the sum of its proper divisors (1).

145565647 is an equidigital number, since it uses as much as digits as its factorization.

145565647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 43.

The square root of 145565647 is about 12065.0589306476. The cubic root of 145565647 is about 526.0410448099.

The spelling of 145565647 in words is "one hundred forty-five million, five hundred sixty-five thousand, six hundred forty-seven".