1089777887 has 8 divisors (see below), whose sum is σ = 1192164480. Its totient is φ = 987943960.

The previous prime is 1089777883. The next prime is 1089777893. The reversal of 1089777887 is 7887779801.

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

It is a cyclic number.

It is not a de Polignac number, because 1089777887 - 2² = 1089777883 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 (1089777883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134033 + ... + 141930.

It is an arithmetic number, because the mean of its divisors is an integer number (149020560).

Almost surely, 2^1089777887 is an apocalyptic number.

1089777887 is a deficient number, since it is larger than the sum of its proper divisors (102386593).

1089777887 is a wasteful number, since it uses less digits than its factorization.

1089777887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276333.

The product of its (nonzero) digits is 11063808, while the sum is 62.

The square root of 1089777887 is about 33011.7840626647. The cubic root of 1089777887 is about 1029.0725578715.

The spelling of 1089777887 in words is "one billion, eighty-nine million, seven hundred seventy-seven thousand, eight hundred eighty-seven".