1021389086 has 8 divisors (see below), whose sum is σ = 1532486520. Its totient is φ = 510560248.

The previous prime is 1021389079. The next prime is 1021389113. The reversal of 1021389086 is 6809831201.

1021389086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57356 + ... + 73023.

It is an arithmetic number, because the mean of its divisors is an integer number (191560815).

Almost surely, 2^1021389086 is an apocalyptic number.

1021389086 is a deficient number, since it is larger than the sum of its proper divisors (511097434).

1021389086 is a wasteful number, since it uses less digits than its factorization.

1021389086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134298.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1021389086 is about 31959.1784312426. The cubic root of 1021389086 is about 1007.0794583319.

It can be divided in two parts, 10213 and 89086, that added together give a palindrome (99299).

The spelling of 1021389086 in words is "one billion, twenty-one million, three hundred eighty-nine thousand, eighty-six".