47899578409 has 2 divisors, whose sum is σ = 47899578410. Its totient is φ = 47899578408.

The previous prime is 47899578319. The next prime is 47899578497. The reversal of 47899578409 is 90487599874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38908746009 + 8990832400 = 197253^2 + 94820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47899578409 is a prime.

It is a super-2 number, since 2×47899578409² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47899578499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23949789204 + 23949789205.

It is an arithmetic number, because the mean of its divisors is an integer number (23949789205).

Almost surely, 2^47899578409 is an apocalyptic number.

It is an amenable number.

47899578409 is a deficient number, since it is larger than the sum of its proper divisors (1).

47899578409 is an equidigital number, since it uses as much as digits as its factorization.

47899578409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 47899578409 in words is "forty-seven billion, eight hundred ninety-nine million, five hundred seventy-eight thousand, four hundred nine".