47578649 has 2 divisors, whose sum is σ = 47578650. Its totient is φ = 47578648.

The previous prime is 47578637. The next prime is 47578669. The reversal of 47578649 is 94687574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46240000 + 1338649 = 6800^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 47578649 - 2²⁰ = 46530073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47578597 and 47578606.

It is not a weakly prime, because it can be changed into another prime (47578669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23789324 + 23789325.

It is an arithmetic number, because the mean of its divisors is an integer number (23789325).

Almost surely, 2^47578649 is an apocalyptic number.

It is an amenable number.

47578649 is a deficient number, since it is larger than the sum of its proper divisors (1).

47578649 is an equidigital number, since it uses as much as digits as its factorization.

47578649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 47578649 is about 6897.7278142878. The cubic root of 47578649 is about 362.3575951152.

The spelling of 47578649 in words is "forty-seven million, five hundred seventy-eight thousand, six hundred forty-nine".