1069144491 has 4 divisors (see below), whose sum is σ = 1425525992. Its totient is φ = 712762992.

The previous prime is 1069144471. The next prime is 1069144511. The reversal of 1069144491 is 1944419601.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1069144471) and next prime (1069144511).

It is not a de Polignac number, because 1069144491 - 2¹⁵ = 1069111723 is a prime.

It is a super-2 number, since 2×1069144491² = 2286139885271298162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1069144411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178190746 + ... + 178190751.

It is an arithmetic number, because the mean of its divisors is an integer number (356381498).

Almost surely, 2^1069144491 is an apocalyptic number.

1069144491 is a deficient number, since it is larger than the sum of its proper divisors (356381501).

1069144491 is an equidigital number, since it uses as much as digits as its factorization.

1069144491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356381500.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1069144491 is about 32697.7750160466. The cubic root of 1069144491 is about 1022.5364564369.

The spelling of 1069144491 in words is "one billion, sixty-nine million, one hundred forty-four thousand, four hundred ninety-one".