90101243340149 has 2 divisors, whose sum is σ = 90101243340150. Its totient is φ = 90101243340148.

The previous prime is 90101243340131. The next prime is 90101243340217. The reversal of 90101243340149 is 94104334210109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88532912911249 + 1568330428900 = 9409193^2 + 1252330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90101243340149 is a prime.

It is a super-2 number, since 2×90101243340149² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90101243340349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45050621670074 + 45050621670075.

It is an arithmetic number, because the mean of its divisors is an integer number (45050621670075).

Almost surely, 2^{90101243340149} is an apocalyptic number.

It is an amenable number.

90101243340149 is a deficient number, since it is larger than the sum of its proper divisors (1).

90101243340149 is an equidigital number, since it uses as much as digits as its factorization.

90101243340149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 90101243340149 in words is "ninety trillion, one hundred one billion, two hundred forty-three million, three hundred forty thousand, one hundred forty-nine".