47135989 has 2 divisors, whose sum is σ = 47135990. Its totient is φ = 47135988.

The previous prime is 47135983. The next prime is 47136013. The reversal of 47135989 is 98953174.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 3179089 = 6630^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 47135989 - 2⁷ = 47135861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47135983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23567994 + 23567995.

It is an arithmetic number, because the mean of its divisors is an integer number (23567995).

Almost surely, 2^47135989 is an apocalyptic number.

It is an amenable number.

47135989 is a deficient number, since it is larger than the sum of its proper divisors (1).

47135989 is an equidigital number, since it uses as much as digits as its factorization.

47135989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 47135989 is about 6865.5654537700. The cubic root of 47135989 is about 361.2303300633.

The spelling of 47135989 in words is "forty-seven million, one hundred thirty-five thousand, nine hundred eighty-nine".