6427194989 has 2 divisors, whose sum is σ = 6427194990. Its totient is φ = 6427194988.

The previous prime is 6427194941. The next prime is 6427195009. The reversal of 6427194989 is 9894917246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6343326025 + 83868964 = 79645^2 + 9158^2 .

It is a cyclic number.

It is not a de Polignac number, because 6427194989 - 2¹² = 6427190893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6427194929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213597494 + 3213597495.

It is an arithmetic number, because the mean of its divisors is an integer number (3213597495).

Almost surely, 2^6427194989 is an apocalyptic number.

It is an amenable number.

6427194989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6427194989 is an equidigital number, since it uses as much as digits as its factorization.

6427194989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 59.

The square root of 6427194989 is about 80169.7885053965. The cubic root of 6427194989 is about 1859.2615665316.

The spelling of 6427194989 in words is "six billion, four hundred twenty-seven million, one hundred ninety-four thousand, nine hundred eighty-nine".