90816149 has 2 divisors, whose sum is σ = 90816150. Its totient is φ = 90816148.

The previous prime is 90816137. The next prime is 90816169. The reversal of 90816149 is 94161809.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67535524 + 23280625 = 8218^2 + 4825^2 .

It is a cyclic number.

It is not a de Polignac number, because 90816149 - 2¹⁶ = 90750613 is a prime.

It is a super-3 number, since 3×90816149³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90816119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45408074 + 45408075.

It is an arithmetic number, because the mean of its divisors is an integer number (45408075).

Almost surely, 2^90816149 is an apocalyptic number.

It is an amenable number.

90816149 is a deficient number, since it is larger than the sum of its proper divisors (1).

90816149 is an equidigital number, since it uses as much as digits as its factorization.

90816149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 90816149 is about 9529.7507312626. The cubic root of 90816149 is about 449.4910278366.

The spelling of 90816149 in words is "ninety million, eight hundred sixteen thousand, one hundred forty-nine".