1036881389 has 6 divisors (see below), whose sum is σ = 1038868074. Its totient is φ = 1034897760.

The previous prime is 1036881371. The next prime is 1036881407. The reversal of 1036881389 is 9831886301.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1036881371) and next prime (1036881407).

It can be written as a sum of positive squares in 3 ways, for example, as 7562500 + 1029318889 = 2750^2 + 32083^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1036881389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1036880389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 877379 + ... + 878559.

It is an arithmetic number, because the mean of its divisors is an integer number (173144679).

Almost surely, 2^1036881389 is an apocalyptic number.

It is an amenable number.

1036881389 is a deficient number, since it is larger than the sum of its proper divisors (1986685).

1036881389 is an frugal number, since it uses more digits than its factorization.

1036881389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1036881389 is about 32200.6426799218. The cubic root of 1036881389 is about 1012.1456815199.

The spelling of 1036881389 in words is "one billion, thirty-six million, eight hundred eighty-one thousand, three hundred eighty-nine".