1986374447 has 2 divisors, whose sum is σ = 1986374448. Its totient is φ = 1986374446.

The previous prime is 1986374441. The next prime is 1986374483. The reversal of 1986374447 is 7444736891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1986374447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986374441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993187223 + 993187224.

It is an arithmetic number, because the mean of its divisors is an integer number (993187224).

Almost surely, 2^1986374447 is an apocalyptic number.

1986374447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986374447 is an equidigital number, since it uses as much as digits as its factorization.

1986374447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 53.

The square root of 1986374447 is about 44568.7608869710. The cubic root of 1986374447 is about 1257.0533408079.

The spelling of 1986374447 in words is "one billion, nine hundred eighty-six million, three hundred seventy-four thousand, four hundred forty-seven".