47781011 has 2 divisors, whose sum is σ = 47781012. Its totient is φ = 47781010.

The previous prime is 47780989. The next prime is 47781047. The reversal of 47781011 is 11018774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47781011 - 2²² = 43586707 is a prime.

It is not a weakly prime, because it can be changed into another prime (47781061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23890505 + 23890506.

It is an arithmetic number, because the mean of its divisors is an integer number (23890506).

Almost surely, 2^47781011 is an apocalyptic number.

47781011 is a deficient number, since it is larger than the sum of its proper divisors (1).

47781011 is an equidigital number, since it uses as much as digits as its factorization.

47781011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 47781011 is about 6912.3809935506. The cubic root of 47781011 is about 362.8705961860.

Adding to 47781011 its reverse (11018774), we get a palindrome (58799785).

The spelling of 47781011 in words is "forty-seven million, seven hundred eighty-one thousand, eleven".