10091987 has 2 divisors, whose sum is σ = 10091988. Its totient is φ = 10091986.

The previous prime is 10091953. The next prime is 10091989. The reversal of 10091987 is 78919001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10091987 - 2⁶ = 10091923 is a prime.

Together with 10091989, 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 (10091989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045993 + 5045994.

It is an arithmetic number, because the mean of its divisors is an integer number (5045994).

Almost surely, 2^10091987 is an apocalyptic number.

10091987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10091987 is an equidigital number, since it uses as much as digits as its factorization.

10091987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 10091987 is about 3176.7887874393. The cubic root of 10091987 is about 216.1020536840.

The spelling of 10091987 in words is "ten million, ninety-one thousand, nine hundred eighty-seven".