10587991 has 8 divisors (see below), whose sum is σ = 11282544. Its totient is φ = 9901440.

The previous prime is 10587979. The next prime is 10588001. The reversal of 10587991 is 19978501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10587991 - 2¹³ = 10579799 is a prime.

It is a super-2 number, since 2×10587991² = 224211106832162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10587091) 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 7 ways as a sum of consecutive naturals, for example, 861 + ... + 4681.

It is an arithmetic number, because the mean of its divisors is an integer number (1410318).

Almost surely, 2^10587991 is an apocalyptic number.

10587991 is a deficient number, since it is larger than the sum of its proper divisors (694553).

10587991 is a wasteful number, since it uses less digits than its factorization.

10587991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 10587991 is about 3253.9193290553. The cubic root of 10587991 is about 219.5859360515.

The spelling of 10587991 in words is "ten million, five hundred eighty-seven thousand, nine hundred ninety-one".