10621889 has 8 divisors (see below), whose sum is σ = 11459880. Its totient is φ = 9807616.

The previous prime is 10621879. The next prime is 10621913. The reversal of 10621889 is 98812601.

It can be written as a sum of positive squares in 4 ways, for example, as 1227664 + 9394225 = 1108^2 + 3065^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10621889 is a prime.

It is a super-2 number, since 2×10621889² = 225649051856642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10621879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4994 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (1432485).

Almost surely, 2^10621889 is an apocalyptic number.

It is an amenable number.

10621889 is a deficient number, since it is larger than the sum of its proper divisors (837991).

10621889 is a wasteful number, since it uses less digits than its factorization.

10621889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11859.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 10621889 is about 3259.1239620487. The cubic root of 10621889 is about 219.8200249846.

The spelling of 10621889 in words is "ten million, six hundred twenty-one thousand, eight hundred eighty-nine".