5639473897 has 2 divisors, whose sum is σ = 5639473898. Its totient is φ = 5639473896.

The previous prime is 5639473871. The next prime is 5639473933. The reversal of 5639473897 is 7983749365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3356927721 + 2282546176 = 57939^2 + 47776^2 .

It is a cyclic number.

It is not a de Polignac number, because 5639473897 - 2⁷ = 5639473769 is a prime.

It is not a weakly prime, because it can be changed into another prime (5639473867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819736948 + 2819736949.

It is an arithmetic number, because the mean of its divisors is an integer number (2819736949).

Almost surely, 2^5639473897 is an apocalyptic number.

It is an amenable number.

5639473897 is a deficient number, since it is larger than the sum of its proper divisors (1).

5639473897 is an equidigital number, since it uses as much as digits as its factorization.

5639473897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 61.

The square root of 5639473897 is about 75096.4306541929. The cubic root of 5639473897 is about 1779.9707415340.

The spelling of 5639473897 in words is "five billion, six hundred thirty-nine million, four hundred seventy-three thousand, eight hundred ninety-seven".