47673781 has 2 divisors, whose sum is σ = 47673782. Its totient is φ = 47673780.

The previous prime is 47673761. The next prime is 47673817. The reversal of 47673781 is 18737674.

Together with next prime (47673817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 970225 = 6834^2 + 985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47673781 is a prime.

It is a super-2 number, since 2×47673781² = 4545578789671922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47673761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23836890 + 23836891.

It is an arithmetic number, because the mean of its divisors is an integer number (23836891).

Almost surely, 2^47673781 is an apocalyptic number.

It is an amenable number.

47673781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47673781 is an equidigital number, since it uses as much as digits as its factorization.

47673781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 43.

The square root of 47673781 is about 6904.6202647213. The cubic root of 47673781 is about 362.5989418387.

The spelling of 47673781 in words is "forty-seven million, six hundred seventy-three thousand, seven hundred eighty-one".