157707647 has 2 divisors, whose sum is σ = 157707648. Its totient is φ = 157707646.

The previous prime is 157707629. The next prime is 157707661. The reversal of 157707647 is 746707751.

It is a strong prime.

It is an emirp because it is prime and its reverse (746707751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157707647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157707598 and 157707607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157707047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78853823 + 78853824.

It is an arithmetic number, because the mean of its divisors is an integer number (78853824).

Almost surely, 2^157707647 is an apocalyptic number.

157707647 is a deficient number, since it is larger than the sum of its proper divisors (1).

157707647 is an equidigital number, since it uses as much as digits as its factorization.

157707647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288120, while the sum is 44.

The square root of 157707647 is about 12558.1705275888. The cubic root of 157707647 is about 540.2783738470.

The spelling of 157707647 in words is "one hundred fifty-seven million, seven hundred seven thousand, six hundred forty-seven".