47313509 has 2 divisors, whose sum is σ = 47313510. Its totient is φ = 47313508.

The previous prime is 47313503. The next prime is 47313527. The reversal of 47313509 is 90531374.

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., 43692100 + 3621409 = 6610^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 47313509 - 2⁴ = 47313493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47313503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23656754 + 23656755.

It is an arithmetic number, because the mean of its divisors is an integer number (23656755).

Almost surely, 2^47313509 is an apocalyptic number.

It is an amenable number.

47313509 is a deficient number, since it is larger than the sum of its proper divisors (1).

47313509 is an equidigital number, since it uses as much as digits as its factorization.

47313509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 47313509 is about 6878.4815911653. The cubic root of 47313509 is about 361.6832414224.

The spelling of 47313509 in words is "forty-seven million, three hundred thirteen thousand, five hundred nine".