3129454891 has 2 divisors, whose sum is σ = 3129454892. Its totient is φ = 3129454890.

The previous prime is 3129454849. The next prime is 3129454901. The reversal of 3129454891 is 1984549213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3129454891 - 2⁹ = 3129454379 is a prime.

It is not a weakly prime, because it can be changed into another prime (3129454091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564727445 + 1564727446.

It is an arithmetic number, because the mean of its divisors is an integer number (1564727446).

Almost surely, 2^3129454891 is an apocalyptic number.

3129454891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3129454891 is an equidigital number, since it uses as much as digits as its factorization.

3129454891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 3129454891 is about 55941.5310033610. The cubic root of 3129454891 is about 1462.7032688565.

The spelling of 3129454891 in words is "three billion, one hundred twenty-nine million, four hundred fifty-four thousand, eight hundred ninety-one".