3969131429 has 6 divisors (see below), whose sum is σ = 4106349030. Its totient is φ = 3831937256.

The previous prime is 3969131291. The next prime is 3969131447. The reversal of 3969131429 is 9241319693.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3421665025 + 547466404 = 58495^2 + 23398^2 .

It is not a de Polignac number, because 3969131429 - 2¹² = 3969127333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969631429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333422 + ... + 345120.

It is an arithmetic number, because the mean of its divisors is an integer number (684391505).

Almost surely, 2^3969131429 is an apocalyptic number.

It is an amenable number.

3969131429 is a deficient number, since it is larger than the sum of its proper divisors (137217601).

3969131429 is an frugal number, since it uses more digits than its factorization.

3969131429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23427 (or 11728 counting only the distinct ones).

The product of its digits is 314928, while the sum is 47.

The square root of 3969131429 is about 63001.0430786666. The cubic root of 3969131429 is about 1583.3071024673.

The spelling of 3969131429 in words is "three billion, nine hundred sixty-nine million, one hundred thirty-one thousand, four hundred twenty-nine".