1393528889 has 2 divisors, whose sum is σ = 1393528890. Its totient is φ = 1393528888.

The previous prime is 1393528859. The next prime is 1393528919. The reversal of 1393528889 is 9888253931.

It is a balanced prime because it is at equal distance from previous prime (1393528859) and next prime (1393528919).

It can be written as a sum of positive squares in only one way, i.e., 1345642489 + 47886400 = 36683^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393528889 - 2¹² = 1393524793 is a prime.

It is a super-4 number, since 4×1393528889⁴ (a number of 38 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (1393528859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696764444 + 696764445.

It is an arithmetic number, because the mean of its divisors is an integer number (696764445).

Almost surely, 2^1393528889 is an apocalyptic number.

It is an amenable number.

1393528889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393528889 is an equidigital number, since it uses as much as digits as its factorization.

1393528889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The square root of 1393528889 is about 37329.9998526654. Note that the first 3 decimals coincide. The cubic root of 1393528889 is about 1116.9626700057.

It can be divided in two parts, 13935 and 28889, that added together give a palindrome (42824).

The spelling of 1393528889 in words is "one billion, three hundred ninety-three million, five hundred twenty-eight thousand, eight hundred eighty-nine".