3139420891 has 2 divisors, whose sum is σ = 3139420892. Its totient is φ = 3139420890.

The previous prime is 3139420877. The next prime is 3139420931. The reversal of 3139420891 is 1980249313.

It is an a-pointer prime, because the next prime (3139420931) can be obtained adding 3139420891 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3139420891 - 2⁵ = 3139420859 is a prime.

It is not a weakly prime, because it can be changed into another prime (3139420831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569710445 + 1569710446.

It is an arithmetic number, because the mean of its divisors is an integer number (1569710446).

Almost surely, 2^3139420891 is an apocalyptic number.

3139420891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3139420891 is an equidigital number, since it uses as much as digits as its factorization.

3139420891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 3139420891 is about 56030.5353445780. The cubic root of 3139420891 is about 1464.2543221453.

The spelling of 3139420891 in words is "three billion, one hundred thirty-nine million, four hundred twenty thousand, eight hundred ninety-one".