90911129 has 2 divisors, whose sum is σ = 90911130. Its totient is φ = 90911128.

The previous prime is 90911101. The next prime is 90911173. The reversal of 90911129 is 92111909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78499600 + 12411529 = 8860^2 + 3523^2 .

It is an emirp because it is prime and its reverse (92111909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90911129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90911095 and 90911104.

It is not a weakly prime, because it can be changed into another prime (90911179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45455564 + 45455565.

It is an arithmetic number, because the mean of its divisors is an integer number (45455565).

Almost surely, 2^90911129 is an apocalyptic number.

It is an amenable number.

90911129 is a deficient number, since it is larger than the sum of its proper divisors (1).

90911129 is an equidigital number, since it uses as much as digits as its factorization.

90911129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 90911129 is about 9534.7327702458. The cubic root of 90911129 is about 449.6476731894.

The spelling of 90911129 in words is "ninety million, nine hundred eleven thousand, one hundred twenty-nine".