47842031 has 2 divisors, whose sum is σ = 47842032. Its totient is φ = 47842030.

The previous prime is 47842009. The next prime is 47842033. The reversal of 47842031 is 13024874.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47842031 is a prime.

It is a super-2 number, since 2×47842031² = 4577719860409922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 47842033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47841985 and 47842003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47842033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23921015 + 23921016.

It is an arithmetic number, because the mean of its divisors is an integer number (23921016).

Almost surely, 2^47842031 is an apocalyptic number.

47842031 is a deficient number, since it is larger than the sum of its proper divisors (1).

47842031 is an equidigital number, since it uses as much as digits as its factorization.

47842031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 47842031 is about 6916.7934044613. The cubic root of 47842031 is about 363.0250016298.

The spelling of 47842031 in words is "forty-seven million, eight hundred forty-two thousand, thirty-one".