4191429661 has 2 divisors, whose sum is σ = 4191429662. Its totient is φ = 4191429660.

The previous prime is 4191429551. The next prime is 4191429689. The reversal of 4191429661 is 1669241914.

4191429661 is digitally balanced in base 2 and base 3, because in such bases 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., 3173181561 + 1018248100 = 56331^2 + 31910^2 .

It is a cyclic number.

It is not a de Polignac number, because 4191429661 - 2¹¹ = 4191427613 is a prime.

It is a super-2 number, since 2×4191429661² = 35136165206221149842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4191429761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2095714830 + 2095714831.

It is an arithmetic number, because the mean of its divisors is an integer number (2095714831).

Almost surely, 2^4191429661 is an apocalyptic number.

It is an amenable number.

4191429661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4191429661 is an equidigital number, since it uses as much as digits as its factorization.

4191429661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 4191429661 is about 64741.2516174966. The cubic root of 4191429661 is about 1612.3304677324.

The spelling of 4191429661 in words is "four billion, one hundred ninety-one million, four hundred twenty-nine thousand, six hundred sixty-one".