100521089 has 2 divisors, whose sum is σ = 100521090. Its totient is φ = 100521088.

The previous prime is 100521079. The next prime is 100521097. The reversal of 100521089 is 980125001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 3301489 = 9860^2 + 1817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100521089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100521079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50260544 + 50260545.

It is an arithmetic number, because the mean of its divisors is an integer number (50260545).

Almost surely, 2^100521089 is an apocalyptic number.

It is an amenable number.

100521089 is a deficient number, since it is larger than the sum of its proper divisors (1).

100521089 is an equidigital number, since it uses as much as digits as its factorization.

100521089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 100521089 is about 10026.0205964281. The cubic root of 100521089 is about 464.9637139759.

The spelling of 100521089 in words is "one hundred million, five hundred twenty-one thousand, eighty-nine".