4969431661 has 2 divisors, whose sum is σ = 4969431662. Its totient is φ = 4969431660.

The previous prime is 4969431637. The next prime is 4969431707. The reversal of 4969431661 is 1661349694.

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., 4841515561 + 127916100 = 69581^2 + 11310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4969431661 - 2⁹ = 4969431149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4969431601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2484715830 + 2484715831.

It is an arithmetic number, because the mean of its divisors is an integer number (2484715831).

Almost surely, 2^4969431661 is an apocalyptic number.

It is an amenable number.

4969431661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4969431661 is an equidigital number, since it uses as much as digits as its factorization.

4969431661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 4969431661 is about 70494.1959383891. The cubic root of 4969431661 is about 1706.4840793122.

The spelling of 4969431661 in words is "four billion, nine hundred sixty-nine million, four hundred thirty-one thousand, six hundred sixty-one".