47764909 has 2 divisors, whose sum is σ = 47764910. Its totient is φ = 47764908.

The previous prime is 47764823. The next prime is 47764931. The reversal of 47764909 is 90946774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42575625 + 5189284 = 6525^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 47764909 - 2²¹ = 45667757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47764939) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23882454 + 23882455.

It is an arithmetic number, because the mean of its divisors is an integer number (23882455).

Almost surely, 2^47764909 is an apocalyptic number.

It is an amenable number.

47764909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47764909 is an equidigital number, since it uses as much as digits as its factorization.

47764909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 47764909 is about 6911.2161737280. The cubic root of 47764909 is about 362.8298296507.

The spelling of 47764909 in words is "forty-seven million, seven hundred sixty-four thousand, nine hundred nine".