1084780987 has 4 divisors (see below), whose sum is σ = 1100971816. Its totient is φ = 1068590160.

The previous prime is 1084780943. The next prime is 1084781023. The reversal of 1084780987 is 7890874801.

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

It is a cyclic number.

It is not a de Polignac number, because 1084780987 - 2²³ = 1076392379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084780187) 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, 8095314 + ... + 8095447.

It is an arithmetic number, because the mean of its divisors is an integer number (275242954).

Almost surely, 2^1084780987 is an apocalyptic number.

1084780987 is a deficient number, since it is larger than the sum of its proper divisors (16190829).

1084780987 is an equidigital number, since it uses as much as digits as its factorization.

1084780987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16190828.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 1084780987 is about 32936.0135262299. The cubic root of 1084780987 is about 1027.4972973883.

The spelling of 1084780987 in words is "one billion, eighty-four million, seven hundred eighty thousand, nine hundred eighty-seven".