47136643 has 4 divisors (see below), whose sum is σ = 48232888. Its totient is φ = 46040400.

The previous prime is 47136589. The next prime is 47136653. The reversal of 47136643 is 34663174.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47136643 is a prime.

It is a super-2 number, since 2×47136643² = 4443726226618898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47136599 and 47136608.

It is not an unprimeable number, because it can be changed into a prime (47136653) 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, 548058 + ... + 548143.

It is an arithmetic number, because the mean of its divisors is an integer number (12058222).

Almost surely, 2^47136643 is an apocalyptic number.

47136643 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

47136643 is a deficient number, since it is larger than the sum of its proper divisors (1096245).

47136643 is a wasteful number, since it uses less digits than its factorization.

47136643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096244.

The product of its digits is 36288, while the sum is 34.

The square root of 47136643 is about 6865.6130826023. The cubic root of 47136643 is about 361.2320007156.

The spelling of 47136643 in words is "forty-seven million, one hundred thirty-six thousand, six hundred forty-three".