3997111669 has 2 divisors, whose sum is σ = 3997111670. Its totient is φ = 3997111668.

The previous prime is 3997111577. The next prime is 3997111691. The reversal of 3997111669 is 9661117993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3534302500 + 462809169 = 59450^2 + 21513^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997111669 - 2¹¹ = 3997109621 is a prime.

It is a super-2 number, since 2×3997111669² = 31953803388911931122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3997117669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998555834 + 1998555835.

It is an arithmetic number, because the mean of its divisors is an integer number (1998555835).

Almost surely, 2^3997111669 is an apocalyptic number.

It is an amenable number.

3997111669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997111669 is an equidigital number, since it uses as much as digits as its factorization.

3997111669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 52.

The square root of 3997111669 is about 63222.7148183309. The cubic root of 3997111669 is about 1587.0188816616.

The spelling of 3997111669 in words is "three billion, nine hundred ninety-seven million, one hundred eleven thousand, six hundred sixty-nine".