1591401099 has 8 divisors (see below), whose sum is σ = 2127214480. Its totient is φ = 1058260896.

The previous prime is 1591401083. The next prime is 1591401103. The reversal of 1591401099 is 9901041951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1591401099 - 2⁴ = 1591401083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1591401599) 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 7 ways as a sum of consecutive naturals, for example, 666904 + ... + 669285.

It is an arithmetic number, because the mean of its divisors is an integer number (265901810).

Almost surely, 2^1591401099 is an apocalyptic number.

1591401099 is a deficient number, since it is larger than the sum of its proper divisors (535813381).

1591401099 is a wasteful number, since it uses less digits than its factorization.

1591401099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336589.

The product of its (nonzero) digits is 14580, while the sum is 39.

The square root of 1591401099 is about 39892.3689319148. The cubic root of 1591401099 is about 1167.5080522228.

The spelling of 1591401099 in words is "one billion, five hundred ninety-one million, four hundred one thousand, ninety-nine".