939887987 has 2 divisors, whose sum is σ = 939887988. Its totient is φ = 939887986.

The previous prime is 939887983. The next prime is 939888041. The reversal of 939887987 is 789788939.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 939887987 - 2² = 939887983 is a prime.

It is a super-3 number, since 3×939887987³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (939887983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469943993 + 469943994.

It is an arithmetic number, because the mean of its divisors is an integer number (469943994).

Almost surely, 2^939887987 is an apocalyptic number.

939887987 is a deficient number, since it is larger than the sum of its proper divisors (1).

939887987 is an equidigital number, since it uses as much as digits as its factorization.

939887987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 68.

The square root of 939887987 is about 30657.5926484778. The cubic root of 939887987 is about 979.5471971065.

The spelling of 939887987 in words is "nine hundred thirty-nine million, eight hundred eighty-seven thousand, nine hundred eighty-seven".