47136391 has 2 divisors, whose sum is σ = 47136392. Its totient is φ = 47136390.

The previous prime is 47136373. The next prime is 47136449. The reversal of 47136391 is 19363174.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47136391 - 2¹¹ = 47134343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47136301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23568195 + 23568196.

It is an arithmetic number, because the mean of its divisors is an integer number (23568196).

Almost surely, 2^47136391 is an apocalyptic number.

47136391 is a deficient number, since it is larger than the sum of its proper divisors (1).

47136391 is an equidigital number, since it uses as much as digits as its factorization.

47136391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 47136391 is about 6865.5947302473. The cubic root of 47136391 is about 361.2313569798.

The spelling of 47136391 in words is "forty-seven million, one hundred thirty-six thousand, three hundred ninety-one".