47677309 has 2 divisors, whose sum is σ = 47677310. Its totient is φ = 47677308.

The previous prime is 47677307. The next prime is 47677313. The reversal of 47677309 is 90377674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 205209 = 6890^2 + 453^2 .

It is a cyclic number.

It is not a de Polignac number, because 47677309 - 2¹ = 47677307 is a prime.

Together with 47677307, it forms a pair of twin primes.

It is equal to p_2869909 and since 47677309 and 2869909 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47677307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23838654 + 23838655.

It is an arithmetic number, because the mean of its divisors is an integer number (23838655).

Almost surely, 2^47677309 is an apocalyptic number.

It is an amenable number.

47677309 is a deficient number, since it is larger than the sum of its proper divisors (1).

47677309 is an equidigital number, since it uses as much as digits as its factorization.

47677309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 43.

The square root of 47677309 is about 6904.8757410977. The cubic root of 47677309 is about 362.6078860807.

The spelling of 47677309 in words is "forty-seven million, six hundred seventy-seven thousand, three hundred nine".