47445649 has 4 divisors (see below), whose sum is σ = 47865636. Its totient is φ = 47025664.

The previous prime is 47445631. The next prime is 47445667. The reversal of 47445649 is 94654474.

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

It is an interprime number because it is at equal distance from previous prime (47445631) and next prime (47445667).

It can be written as a sum of positive squares in 2 ways, for example, as 16443025 + 31002624 = 4055^2 + 5568^2 .

It is a cyclic number.

It is not a de Polignac number, because 47445649 - 2¹³ = 47437457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47445689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209824 + ... + 210049.

It is an arithmetic number, because the mean of its divisors is an integer number (11966409).

Almost surely, 2^47445649 is an apocalyptic number.

It is an amenable number.

47445649 is a deficient number, since it is larger than the sum of its proper divisors (419987).

47445649 is a wasteful number, since it uses less digits than its factorization.

47445649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419986.

The product of its digits is 483840, while the sum is 43.

The square root of 47445649 is about 6888.0802114958. The cubic root of 47445649 is about 362.0196386485.

The spelling of 47445649 in words is "forty-seven million, four hundred forty-five thousand, six hundred forty-nine".