4171979657 has 2 divisors, whose sum is σ = 4171979658. Its totient is φ = 4171979656.

The previous prime is 4171979653. The next prime is 4171979699. The reversal of 4171979657 is 7569791714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4007396416 + 164583241 = 63304^2 + 12829^2 .

It is a cyclic number.

It is not a de Polignac number, because 4171979657 - 2² = 4171979653 is a prime.

It is not a weakly prime, because it can be changed into another prime (4171979653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085989828 + 2085989829.

It is an arithmetic number, because the mean of its divisors is an integer number (2085989829).

Almost surely, 2^4171979657 is an apocalyptic number.

It is an amenable number.

4171979657 is a deficient number, since it is larger than the sum of its proper divisors (1).

4171979657 is an equidigital number, since it uses as much as digits as its factorization.

4171979657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 56.

The square root of 4171979657 is about 64590.8635721802. The cubic root of 4171979657 is about 1609.8326352779.

The spelling of 4171979657 in words is "four billion, one hundred seventy-one million, nine hundred seventy-nine thousand, six hundred fifty-seven".