47081387 has 2 divisors, whose sum is σ = 47081388. Its totient is φ = 47081386.

The previous prime is 47081383. The next prime is 47081399. The reversal of 47081387 is 78318074.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47081387 - 2² = 47081383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47081387.

It is not a weakly prime, because it can be changed into another prime (47081383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23540693 + 23540694.

It is an arithmetic number, because the mean of its divisors is an integer number (23540694).

Almost surely, 2^47081387 is an apocalyptic number.

47081387 is a deficient number, since it is larger than the sum of its proper divisors (1).

47081387 is an equidigital number, since it uses as much as digits as its factorization.

47081387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 47081387 is about 6861.5877900090. The cubic root of 47081387 is about 361.0907939409.

The spelling of 47081387 in words is "forty-seven million, eighty-one thousand, three hundred eighty-seven".