47449931 has 4 divisors (see below), whose sum is σ = 48459552. Its totient is φ = 46440312.

The previous prime is 47449879. The next prime is 47449949. The reversal of 47449931 is 13994474.

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-47449931 is a prime.

It is a super-2 number, since 2×47449931² = 4502991903809522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47449951) 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, 504740 + ... + 504833.

It is an arithmetic number, because the mean of its divisors is an integer number (12114888).

Almost surely, 2^47449931 is an apocalyptic number.

47449931 is a deficient number, since it is larger than the sum of its proper divisors (1009621).

47449931 is a wasteful number, since it uses less digits than its factorization.

47449931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009620.

The product of its digits is 108864, while the sum is 41.

The square root of 47449931 is about 6888.3910312932. The cubic root of 47449931 is about 362.0305291551.

It can be divided in two parts, 474 and 49931, that added together give a palindrome (50405).

The spelling of 47449931 in words is "forty-seven million, four hundred forty-nine thousand, nine hundred thirty-one".