47645165 has 4 divisors (see below), whose sum is σ = 57174204. Its totient is φ = 38116128.

The previous prime is 47645153. The next prime is 47645183. The reversal of 47645165 is 56154674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56154674 = 2 ⋅28077337.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 35832196 = 3437^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 47645165 - 2⁴ = 47645149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4764512 + ... + 4764521.

It is an arithmetic number, because the mean of its divisors is an integer number (14293551).

Almost surely, 2^47645165 is an apocalyptic number.

It is an amenable number.

47645165 is a deficient number, since it is larger than the sum of its proper divisors (9529039).

47645165 is an equidigital number, since it uses as much as digits as its factorization.

47645165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529038.

The product of its digits is 100800, while the sum is 38.

The square root of 47645165 is about 6902.5477180531. The cubic root of 47645165 is about 362.5263777872.

The spelling of 47645165 in words is "forty-seven million, six hundred forty-five thousand, one hundred sixty-five".