47345647 has 2 divisors, whose sum is σ = 47345648. Its totient is φ = 47345646.

The previous prime is 47345593. The next prime is 47345651. The reversal of 47345647 is 74654374.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47345647 is a prime.

It is a super-2 number, since 2×47345647² = 4483220579697218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47345677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23672823 + 23672824.

It is an arithmetic number, because the mean of its divisors is an integer number (23672824).

Almost surely, 2^47345647 is an apocalyptic number.

47345647 is a deficient number, since it is larger than the sum of its proper divisors (1).

47345647 is an equidigital number, since it uses as much as digits as its factorization.

47345647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 40.

The square root of 47345647 is about 6880.8173206386. The cubic root of 47345647 is about 361.7651147634.

The spelling of 47345647 in words is "forty-seven million, three hundred forty-five thousand, six hundred forty-seven".