1088536981 has 4 divisors (see below), whose sum is σ = 1244042272. Its totient is φ = 933031692.

The previous prime is 1088536963. The next prime is 1088536987. The reversal of 1088536981 is 1896358801.

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 1088536981 - 2⁷ = 1088536853 is a prime.

It is a super-2 number, since 2×1088536981² = 2369825518009188722, 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 (1088536987) 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, 77752635 + ... + 77752648.

It is an arithmetic number, because the mean of its divisors is an integer number (311010568).

Almost surely, 2^1088536981 is an apocalyptic number.

It is an amenable number.

1088536981 is a deficient number, since it is larger than the sum of its proper divisors (155505291).

1088536981 is an equidigital number, since it uses as much as digits as its factorization.

1088536981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155505290.

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 1088536981 is about 32992.9838147446. The cubic root of 1088536981 is about 1028.6818154630.

The spelling of 1088536981 in words is "one billion, eighty-eight million, five hundred thirty-six thousand, nine hundred eighty-one".