47870645 has 4 divisors (see below), whose sum is σ = 57444780. Its totient is φ = 38296512.

The previous prime is 47870617. The next prime is 47870651. The reversal of 47870645 is 54607874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29008996 + 18861649 = 5386^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 47870645 - 2²² = 43676341 is a prime.

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, 4787060 + ... + 4787069.

It is an arithmetic number, because the mean of its divisors is an integer number (14361195).

Almost surely, 2^47870645 is an apocalyptic number.

It is an amenable number.

47870645 is a deficient number, since it is larger than the sum of its proper divisors (9574135).

47870645 is an equidigital number, since it uses as much as digits as its factorization.

47870645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574134.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 47870645 is about 6918.8615392997. The cubic root of 47870645 is about 363.0973614840.

The spelling of 47870645 in words is "forty-seven million, eight hundred seventy thousand, six hundred forty-five".