10202989 has 2 divisors, whose sum is σ = 10202990. Its totient is φ = 10202988.

The previous prime is 10202987. The next prime is 10203001. The reversal of 10202989 is 98920201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5546025 + 4656964 = 2355^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202989 - 2¹ = 10202987 is a prime.

Together with 10202987, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 10202989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101494 + 5101495.

It is an arithmetic number, because the mean of its divisors is an integer number (5101495).

Almost surely, 2^10202989 is an apocalyptic number.

It is an amenable number.

10202989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202989 is an equidigital number, since it uses as much as digits as its factorization.

10202989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 10202989 is about 3194.2117963592. The cubic root of 10202989 is about 216.8914702892.

The spelling of 10202989 in words is "ten million, two hundred two thousand, nine hundred eighty-nine".