47942731 has 2 divisors, whose sum is σ = 47942732. Its totient is φ = 47942730.

The previous prime is 47942729. The next prime is 47942743. The reversal of 47942731 is 13724974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47942731 - 2¹ = 47942729 is a prime.

It is a super-2 number, since 2×47942731² = 4597010911476722, which contains 22 as substring.

Together with 47942729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47942761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23971365 + 23971366.

It is an arithmetic number, because the mean of its divisors is an integer number (23971366).

Almost surely, 2^47942731 is an apocalyptic number.

47942731 is a deficient number, since it is larger than the sum of its proper divisors (1).

47942731 is an equidigital number, since it uses as much as digits as its factorization.

47942731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 47942731 is about 6924.0689626837. The cubic root of 47942731 is about 363.2795267701.

The spelling of 47942731 in words is "forty-seven million, nine hundred forty-two thousand, seven hundred thirty-one".