1083720787 has 16 divisors (see below), whose sum is σ = 1141668352. Its totient is φ = 1027404000.

The previous prime is 1083720751. The next prime is 1083720793. The reversal of 1083720787 is 7870273801.

It is a cyclic number.

It is not a de Polignac number, because 1083720787 - 2¹⁵ = 1083688019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1083720797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194388 + ... + 1195294.

It is an arithmetic number, because the mean of its divisors is an integer number (71354272).

Almost surely, 2^1083720787 is an apocalyptic number.

1083720787 is a deficient number, since it is larger than the sum of its proper divisors (57947565).

1083720787 is an equidigital number, since it uses as much as digits as its factorization.

1083720787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 1083720787 is about 32919.9147477632. The cubic root of 1083720787 is about 1027.1624501611.

The spelling of 1083720787 in words is "one billion, eighty-three million, seven hundred twenty thousand, seven hundred eighty-seven".