87120783 has 6 divisors (see below), whose sum is σ = 125841144. Its totient is φ = 58080516.

The previous prime is 87120773. The next prime is 87120827. The reversal of 87120783 is 38702178.

It is not a de Polignac number, because 87120783 - 2¹⁶ = 87055247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87120773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4840035 + ... + 4840052.

It is an arithmetic number, because the mean of its divisors is an integer number (20973524).

Almost surely, 2^87120783 is an apocalyptic number.

87120783 is a deficient number, since it is larger than the sum of its proper divisors (38720361).

87120783 is a wasteful number, since it uses less digits than its factorization.

87120783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680093 (or 9680090 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 87120783 is about 9333.8514558568. The cubic root of 87120783 is about 443.3097229906.

The spelling of 87120783 in words is "eighty-seven million, one hundred twenty thousand, seven hundred eighty-three".