1029491001 has 24 divisors (see below), whose sum is σ = 1853976384. Its totient is φ = 534800160.

The previous prime is 1029490963. The next prime is 1029491009. The reversal of 1029491001 is 1001949201.

It is not a de Polignac number, because 1029491001 - 2⁶ = 1029490937 is a prime.

It is a super-2 number, since 2×1029491001² = 2119703442279964002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1029491009) 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 in 23 ways as a sum of consecutive naturals, for example, 742086 + ... + 743471.

It is an arithmetic number, because the mean of its divisors is an integer number (77249016).

Almost surely, 2^1029491001 is an apocalyptic number.

1029491001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1029491001 is a deficient number, since it is larger than the sum of its proper divisors (824485383).

1029491001 is a wasteful number, since it uses less digits than its factorization.

1029491001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485581 (or 1485578 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1029491001 is about 32085.6821806861. The cubic root of 1029491001 is about 1009.7352510014.

The spelling of 1029491001 in words is "one billion, twenty-nine million, four hundred ninety-one thousand, one".