47381945 has 8 divisors (see below), whose sum is σ = 61232136. Its totient is φ = 34989696.

The previous prime is 47381927. The next prime is 47381963. The reversal of 47381945 is 54918374.

It is an interprime number because it is at equal distance from previous prime (47381927) and next prime (47381963).

It can be written as a sum of positive squares in 4 ways, for example, as 212521 + 47169424 = 461^2 + 6868^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47381945 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364412 + ... + 364541.

It is an arithmetic number, because the mean of its divisors is an integer number (7654017).

Almost surely, 2^47381945 is an apocalyptic number.

It is an amenable number.

47381945 is a deficient number, since it is larger than the sum of its proper divisors (13850191).

47381945 is a wasteful number, since it uses less digits than its factorization.

47381945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728971.

The product of its digits is 120960, while the sum is 41.

The square root of 47381945 is about 6883.4544379984. The cubic root of 47381945 is about 361.8575413935.

The spelling of 47381945 in words is "forty-seven million, three hundred eighty-one thousand, nine hundred forty-five".