270439891 has 2 divisors, whose sum is σ = 270439892. Its totient is φ = 270439890.

The previous prime is 270439889. The next prime is 270439913. The reversal of 270439891 is 198934072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 270439891 - 2¹ = 270439889 is a prime.

Together with 270439889, it forms a pair of twin primes.

It is equal to p_14733997 and since 270439891 and 14733997 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (270439811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135219945 + 135219946.

It is an arithmetic number, because the mean of its divisors is an integer number (135219946).

Almost surely, 2^270439891 is an apocalyptic number.

270439891 is a deficient number, since it is larger than the sum of its proper divisors (1).

270439891 is an equidigital number, since it uses as much as digits as its factorization.

270439891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 270439891 is about 16445.0567344719. The cubic root of 270439891 is about 646.6812226444.

The spelling of 270439891 in words is "two hundred seventy million, four hundred thirty-nine thousand, eight hundred ninety-one".