439089491 has 2 divisors, whose sum is σ = 439089492. Its totient is φ = 439089490.

The previous prime is 439089461. The next prime is 439089517. The reversal of 439089491 is 194980934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439089491 is a prime.

It is a super-2 number, since 2×439089491² = 385599162213278162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (439089401) 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, 219544745 + 219544746.

It is an arithmetic number, because the mean of its divisors is an integer number (219544746).

Almost surely, 2^439089491 is an apocalyptic number.

439089491 is a deficient number, since it is larger than the sum of its proper divisors (1).

439089491 is an equidigital number, since it uses as much as digits as its factorization.

439089491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 439089491 is about 20954.4623171295. The cubic root of 439089491 is about 760.0654900859.

The spelling of 439089491 in words is "four hundred thirty-nine million, eighty-nine thousand, four hundred ninety-one".