10897987 has 4 divisors (see below), whose sum is σ = 10904760. Its totient is φ = 10891216.

The previous prime is 10897981. The next prime is 10897993. The reversal of 10897987 is 78979801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78979801 = 67 ⋅1178803.

It is an interprime number because it is at equal distance from previous prime (10897981) and next prime (10897993).

It is a cyclic number.

It is not a de Polignac number, because 10897987 - 2³ = 10897979 is a prime.

It is a super-2 number, since 2×10897987² = 237532241304338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10897987.

It is not an unprimeable number, because it can be changed into a prime (10897981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564 + ... + 4702.

It is an arithmetic number, because the mean of its divisors is an integer number (2726190).

Almost surely, 2^10897987 is an apocalyptic number.

10897987 is a deficient number, since it is larger than the sum of its proper divisors (6773).

10897987 is an equidigital number, since it uses as much as digits as its factorization.

10897987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 10897987 is about 3301.2099297076. The cubic root of 10897987 is about 221.7083731300.

The spelling of 10897987 in words is "ten million, eight hundred ninety-seven thousand, nine hundred eighty-seven".