3998786437 has 2 divisors, whose sum is σ = 3998786438. Its totient is φ = 3998786436.

The previous prime is 3998786383. The next prime is 3998786489. The reversal of 3998786437 is 7346878993.

3998786437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2412676161 + 1586110276 = 49119^2 + 39826^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998786437 - 2¹¹ = 3998784389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998766437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999393218 + 1999393219.

It is an arithmetic number, because the mean of its divisors is an integer number (1999393219).

Almost surely, 2^3998786437 is an apocalyptic number.

It is an amenable number.

3998786437 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998786437 is an equidigital number, since it uses as much as digits as its factorization.

3998786437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 64.

The square root of 3998786437 is about 63235.9584176598. The cubic root of 3998786437 is about 1587.2405014654.

The spelling of 3998786437 in words is "three billion, nine hundred ninety-eight million, seven hundred eighty-six thousand, four hundred thirty-seven".