90897151 has 2 divisors, whose sum is σ = 90897152. Its totient is φ = 90897150.

The previous prime is 90897143. The next prime is 90897161. The reversal of 90897151 is 15179809.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15179809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90897151 - 2³ = 90897143 is a prime.

It is a Chen prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90897161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45448575 + 45448576.

It is an arithmetic number, because the mean of its divisors is an integer number (45448576).

Almost surely, 2^90897151 is an apocalyptic number.

90897151 is a deficient number, since it is larger than the sum of its proper divisors (1).

90897151 is an equidigital number, since it uses as much as digits as its factorization.

90897151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 90897151 is about 9533.9997377806. Note that the first 3 decimals coincide. The cubic root of 90897151 is about 449.6246268826.

The spelling of 90897151 in words is "ninety million, eight hundred ninety-seven thousand, one hundred fifty-one".