3199129421 has 2 divisors, whose sum is σ = 3199129422. Its totient is φ = 3199129420.

The previous prime is 3199129397. The next prime is 3199129433. The reversal of 3199129421 is 1249219913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2645044900 + 554084521 = 51430^2 + 23539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3199129421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3199129621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599564710 + 1599564711.

It is an arithmetic number, because the mean of its divisors is an integer number (1599564711).

Almost surely, 2^3199129421 is an apocalyptic number.

It is an amenable number.

3199129421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3199129421 is an equidigital number, since it uses as much as digits as its factorization.

3199129421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 3199129421 is about 56560.8470675608. The cubic root of 3199129421 is about 1473.4789523165.

The spelling of 3199129421 in words is "three billion, one hundred ninety-nine million, one hundred twenty-nine thousand, four hundred twenty-one".