47819509 has 2 divisors, whose sum is σ = 47819510. Its totient is φ = 47819508.

The previous prime is 47819479. The next prime is 47819533. The reversal of 47819509 is 90591874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 168100 = 6903^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 47819509 - 2¹¹ = 47817461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47819609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23909754 + 23909755.

It is an arithmetic number, because the mean of its divisors is an integer number (23909755).

Almost surely, 2^47819509 is an apocalyptic number.

It is an amenable number.

47819509 is a deficient number, since it is larger than the sum of its proper divisors (1).

47819509 is an equidigital number, since it uses as much as digits as its factorization.

47819509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 47819509 is about 6915.1651462565. The cubic root of 47819509 is about 362.9680270949.

The spelling of 47819509 in words is "forty-seven million, eight hundred nineteen thousand, five hundred nine".