669383987 has 2 divisors, whose sum is σ = 669383988. Its totient is φ = 669383986.

The previous prime is 669383963. The next prime is 669383989. The reversal of 669383987 is 789383966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669383987 - 2¹⁶ = 669318451 is a prime.

It is a super-3 number, since 3×669383987³ (a number of 27 digits) contains 333 as substring.

Together with 669383989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669383989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334691993 + 334691994.

It is an arithmetic number, because the mean of its divisors is an integer number (334691994).

Almost surely, 2^669383987 is an apocalyptic number.

669383987 is a deficient number, since it is larger than the sum of its proper divisors (1).

669383987 is an equidigital number, since it uses as much as digits as its factorization.

669383987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The square root of 669383987 is about 25872.4561454841. The cubic root of 669383987 is about 874.7657547655.

The spelling of 669383987 in words is "six hundred sixty-nine million, three hundred eighty-three thousand, nine hundred eighty-seven".