1013211989 has 4 divisors (see below), whose sum is σ = 1028334624. Its totient is φ = 998089356.

The previous prime is 1013211923. The next prime is 1013212001. The reversal of 1013211989 is 9891123101.

1013211989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1013211989 - 2⁸ = 1013211733 is a prime.

It is a super-2 number, since 2×1013211989² = 2053197069306672242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013211919) 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, 7561217 + ... + 7561350.

It is an arithmetic number, because the mean of its divisors is an integer number (257083656).

Almost surely, 2^1013211989 is an apocalyptic number.

It is an amenable number.

1013211989 is a deficient number, since it is larger than the sum of its proper divisors (15122635).

1013211989 is an equidigital number, since it uses as much as digits as its factorization.

1013211989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15122634.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1013211989 is about 31830.9910150470. The cubic root of 1013211989 is about 1004.3847422683.

The spelling of 1013211989 in words is "one billion, thirteen million, two hundred eleven thousand, nine hundred eighty-nine".