1088428969 has 4 divisors (see below), whose sum is σ = 1096373844. Its totient is φ = 1080484096.

The previous prime is 1088428951. The next prime is 1088428987. The reversal of 1088428969 is 9698248801.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1088428951) and next prime (1088428987).

It can be written as a sum of positive squares in 2 ways, for example, as 330803344 + 757625625 = 18188^2 + 27525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1088428969 - 2⁹ = 1088428457 is a prime.

It is a super-3 number, since 3×1088428969³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1088428909) 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, 3972232 + ... + 3972505.

It is an arithmetic number, because the mean of its divisors is an integer number (274093461).

Almost surely, 2^1088428969 is an apocalyptic number.

It is an amenable number.

1088428969 is a deficient number, since it is larger than the sum of its proper divisors (7944875).

1088428969 is an equidigital number, since it uses as much as digits as its factorization.

1088428969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944874.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The square root of 1088428969 is about 32991.3468806595. The cubic root of 1088428969 is about 1028.6477900823.

The spelling of 1088428969 in words is "one billion, eighty-eight million, four hundred twenty-eight thousand, nine hundred sixty-nine".