10087691 has 4 divisors (see below), whose sum is σ = 10105752. Its totient is φ = 10069632.

The previous prime is 10087687. The next prime is 10087703. The reversal of 10087691 is 19678001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10087691 - 2² = 10087687 is a prime.

It is a super-2 number, since 2×10087691² = 203523019422962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10087661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8165 + ... + 9318.

It is an arithmetic number, because the mean of its divisors is an integer number (2526438).

Almost surely, 2^10087691 is an apocalyptic number.

10087691 is a deficient number, since it is larger than the sum of its proper divisors (18061).

10087691 is an equidigital number, since it uses as much as digits as its factorization.

10087691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18060.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 10087691 is about 3176.1125609776. The cubic root of 10087691 is about 216.0713855845.

The spelling of 10087691 in words is "ten million, eighty-seven thousand, six hundred ninety-one".