10520989 has 4 divisors (see below), whose sum is σ = 10619424. Its totient is φ = 10422556.

The previous prime is 10520981. The next prime is 10521001. The reversal of 10520989 is 98902501.

10520989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10520989 - 2³ = 10520981 is a prime.

It is a super-2 number, since 2×10520989² = 221382419076242, 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 (10520981) 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, 49057 + ... + 49270.

It is an arithmetic number, because the mean of its divisors is an integer number (2654856).

Almost surely, 2^10520989 is an apocalyptic number.

It is an amenable number.

10520989 is a deficient number, since it is larger than the sum of its proper divisors (98435).

10520989 is an equidigital number, since it uses as much as digits as its factorization.

10520989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98434.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 10520989 is about 3243.6074053436. The cubic root of 10520989 is about 219.1217673850.

The spelling of 10520989 in words is "ten million, five hundred twenty thousand, nine hundred eighty-nine".