807139219891 has 2 divisors, whose sum is σ = 807139219892. Its totient is φ = 807139219890.

The previous prime is 807139219879. The next prime is 807139219969. The reversal of 807139219891 is 198912931708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 807139219891 - 2⁹ = 807139219379 is a prime.

It is not a weakly prime, because it can be changed into another prime (807139219291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403569609945 + 403569609946.

It is an arithmetic number, because the mean of its divisors is an integer number (403569609946).

Almost surely, 2^807139219891 is an apocalyptic number.

807139219891 is a deficient number, since it is larger than the sum of its proper divisors (1).

807139219891 is an equidigital number, since it uses as much as digits as its factorization.

807139219891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The spelling of 807139219891 in words is "eight hundred seven billion, one hundred thirty-nine million, two hundred nineteen thousand, eight hundred ninety-one".