917482987 has 4 divisors (see below), whose sum is σ = 917760456. Its totient is φ = 917205520.

The previous prime is 917482967. The next prime is 917482991. The reversal of 917482987 is 789284719.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789284719 = 19 ⋅41541301.

It is a cyclic number.

It is not a de Polignac number, because 917482987 - 2⁷ = 917482859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (917482967) 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, 133714 + ... + 140407.

It is an arithmetic number, because the mean of its divisors is an integer number (229440114).

Almost surely, 2^917482987 is an apocalyptic number.

917482987 is a deficient number, since it is larger than the sum of its proper divisors (277469).

917482987 is a wasteful number, since it uses less digits than its factorization.

917482987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277468.

The product of its digits is 2032128, while the sum is 55.

The square root of 917482987 is about 30289.9816275943. The cubic root of 917482987 is about 971.7010528069.

The spelling of 917482987 in words is "nine hundred seventeen million, four hundred eighty-two thousand, nine hundred eighty-seven".