47661345 has 16 divisors (see below), whose sum is σ = 84731520. Its totient is φ = 25419312.

The previous prime is 47661343. The next prime is 47661347. The reversal of 47661345 is 54316674.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47661343) and next prime (47661347).

It is not a de Polignac number, because 47661345 - 2¹ = 47661343 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47661343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176389 + ... + 176658.

It is an arithmetic number, because the mean of its divisors is an integer number (5295720).

Almost surely, 2^47661345 is an apocalyptic number.

47661345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47661345 is a deficient number, since it is larger than the sum of its proper divisors (37070175).

47661345 is a wasteful number, since it uses less digits than its factorization.

47661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353061 (or 353055 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 47661345 is about 6903.7196495802. The cubic root of 47661345 is about 362.5674103728.

The spelling of 47661345 in words is "forty-seven million, six hundred sixty-one thousand, three hundred forty-five".