3980194657 has 2 divisors, whose sum is σ = 3980194658. Its totient is φ = 3980194656.

The previous prime is 3980194633. The next prime is 3980194711. The reversal of 3980194657 is 7564910893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3943337616 + 36857041 = 62796^2 + 6071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3980194657 is a prime.

It is a super-2 number, since 2×3980194657² = 31683899015222695298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3980194607) 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, 1990097328 + 1990097329.

It is an arithmetic number, because the mean of its divisors is an integer number (1990097329).

Almost surely, 2^3980194657 is an apocalyptic number.

It is an amenable number.

3980194657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3980194657 is an equidigital number, since it uses as much as digits as its factorization.

3980194657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 3980194657 is about 63088.7839239274. The cubic root of 3980194657 is about 1584.7767974763.

The spelling of 3980194657 in words is "three billion, nine hundred eighty million, one hundred ninety-four thousand, six hundred fifty-seven".