3798661591 has 2 divisors, whose sum is σ = 3798661592. Its totient is φ = 3798661590.

The previous prime is 3798661571. The next prime is 3798661673. The reversal of 3798661591 is 1951668973.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3798661591 - 2⁹ = 3798661079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3798661511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1899330795 + 1899330796.

It is an arithmetic number, because the mean of its divisors is an integer number (1899330796).

Almost surely, 2^3798661591 is an apocalyptic number.

3798661591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3798661591 is an equidigital number, since it uses as much as digits as its factorization.

3798661591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 3798661591 is about 61633.2831431200. The cubic root of 3798661591 is about 1560.3075208727.

The spelling of 3798661591 in words is "three billion, seven hundred ninety-eight million, six hundred sixty-one thousand, five hundred ninety-one".