47129631 has 4 divisors (see below), whose sum is σ = 62839512. Its totient is φ = 31419752.

The previous prime is 47129629. The next prime is 47129639. The reversal of 47129631 is 13692174.

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 47129631 - 2¹ = 47129629 is a prime.

It is a super-2 number, since 2×47129631² = 4442404236392322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47129592 and 47129601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47129639) 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, 7854936 + ... + 7854941.

It is an arithmetic number, because the mean of its divisors is an integer number (15709878).

Almost surely, 2^47129631 is an apocalyptic number.

47129631 is a deficient number, since it is larger than the sum of its proper divisors (15709881).

47129631 is a wasteful number, since it uses less digits than its factorization.

47129631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15709880.

The product of its digits is 9072, while the sum is 33.

The square root of 47129631 is about 6865.1024027322. The cubic root of 47129631 is about 361.2140876566.

The spelling of 47129631 in words is "forty-seven million, one hundred twenty-nine thousand, six hundred thirty-one".