1591449027 has 16 divisors (see below), whose sum is σ = 2450068992. Its totient is φ = 900023040.

The previous prime is 1591449023. The next prime is 1591449029. The reversal of 1591449027 is 7209441951.

It is not a de Polignac number, because 1591449027 - 2² = 1591449023 is a prime.

It is a super-4 number, since 4×1591449027⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1591449027.

It is not an unprimeable number, because it can be changed into a prime (1591449023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388599 + ... + 392672.

It is an arithmetic number, because the mean of its divisors is an integer number (153129312).

Almost surely, 2^1591449027 is an apocalyptic number.

1591449027 is a deficient number, since it is larger than the sum of its proper divisors (858619965).

1591449027 is an equidigital number, since it uses as much as digits as its factorization.

1591449027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781378.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1591449027 is about 39892.9696437856. The cubic root of 1591449027 is about 1167.5197726630.

The spelling of 1591449027 in words is "one billion, five hundred ninety-one million, four hundred forty-nine thousand, twenty-seven".