47047731 has 4 divisors (see below), whose sum is σ = 62730312. Its totient is φ = 31365152.

The previous prime is 47047727. The next prime is 47047751. The reversal of 47047731 is 13774074.

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

It is a cyclic number.

It is not a de Polignac number, because 47047731 - 2² = 47047727 is a prime.

It is a super-2 number, since 2×47047731² = 4426977984496722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47047692 and 47047701.

It is not an unprimeable number, because it can be changed into a prime (47047711) 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, 7841286 + ... + 7841291.

It is an arithmetic number, because the mean of its divisors is an integer number (15682578).

Almost surely, 2^47047731 is an apocalyptic number.

47047731 is a deficient number, since it is larger than the sum of its proper divisors (15682581).

47047731 is a wasteful number, since it uses less digits than its factorization.

47047731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15682580.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 47047731 is about 6859.1348579832. The cubic root of 47047731 is about 361.0047318436.

The spelling of 47047731 in words is "forty-seven million, forty-seven thousand, seven hundred thirty-one".