920782987 has 8 divisors (see below), whose sum is σ = 953551872. Its totient is φ = 888205800.

The previous prime is 920782957. The next prime is 920782991. The reversal of 920782987 is 789287029.

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

It is not a de Polignac number, because 920782987 - 2¹⁵ = 920750219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920782957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38113 + ... + 57394.

It is an arithmetic number, because the mean of its divisors is an integer number (119193984).

Almost surely, 2^920782987 is an apocalyptic number.

920782987 is a deficient number, since it is larger than the sum of its proper divisors (32768885).

920782987 is a wasteful number, since it uses less digits than its factorization.

920782987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95849.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 920782987 is about 30344.4061896093. The cubic root of 920782987 is about 972.8646626217.

The spelling of 920782987 in words is "nine hundred twenty million, seven hundred eighty-two thousand, nine hundred eighty-seven".