10121687 has 2 divisors, whose sum is σ = 10121688. Its totient is φ = 10121686.

The previous prime is 10121677. The next prime is 10121693. The reversal of 10121687 is 78612101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10121687 - 2¹⁸ = 9859543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060843 + 5060844.

It is an arithmetic number, because the mean of its divisors is an integer number (5060844).

Almost surely, 2^10121687 is an apocalyptic number.

10121687 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121687 is an equidigital number, since it uses as much as digits as its factorization.

10121687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 10121687 is about 3181.4598850213. The cubic root of 10121687 is about 216.3138370568.

Adding to 10121687 its reverse (78612101), we get a palindrome (88733788).

The spelling of 10121687 in words is "ten million, one hundred twenty-one thousand, six hundred eighty-seven".