47164639 has 2 divisors, whose sum is σ = 47164640. Its totient is φ = 47164638.

The previous prime is 47164591. The next prime is 47164709. The reversal of 47164639 is 93646174.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47164639 - 2¹⁹ = 46640351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47164339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23582319 + 23582320.

It is an arithmetic number, because the mean of its divisors is an integer number (23582320).

Almost surely, 2^47164639 is an apocalyptic number.

47164639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47164639 is an equidigital number, since it uses as much as digits as its factorization.

47164639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 47164639 is about 6867.6516364766. The cubic root of 47164639 is about 361.3035024104.

The spelling of 47164639 in words is "forty-seven million, one hundred sixty-four thousand, six hundred thirty-nine".