157805647 has 2 divisors, whose sum is σ = 157805648. Its totient is φ = 157805646.

The previous prime is 157805639. The next prime is 157805651. The reversal of 157805647 is 746508751.

It is a strong prime.

It is an emirp because it is prime and its reverse (746508751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157805647 - 2³ = 157805639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157805677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78902823 + 78902824.

It is an arithmetic number, because the mean of its divisors is an integer number (78902824).

Almost surely, 2^157805647 is an apocalyptic number.

157805647 is a deficient number, since it is larger than the sum of its proper divisors (1).

157805647 is an equidigital number, since it uses as much as digits as its factorization.

157805647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 157805647 is about 12562.0717638453. The cubic root of 157805647 is about 540.3902608697.

The spelling of 157805647 in words is "one hundred fifty-seven million, eight hundred five thousand, six hundred forty-seven".