90898097 has 4 divisors (see below), whose sum is σ = 91158900. Its totient is φ = 90637296.

The previous prime is 90898079. The next prime is 90898117. The reversal of 90898097 is 79089809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79089809 = 131 ⋅603739.

It can be written as a sum of positive squares in 2 ways, for example, as 37957921 + 52940176 = 6161^2 + 7276^2 .

It is a cyclic number.

It is not a de Polignac number, because 90898097 - 2²⁰ = 89849521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90898037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129878 + ... + 130575.

It is an arithmetic number, because the mean of its divisors is an integer number (22789725).

Almost surely, 2^90898097 is an apocalyptic number.

It is an amenable number.

90898097 is a deficient number, since it is larger than the sum of its proper divisors (260803).

90898097 is a wasteful number, since it uses less digits than its factorization.

90898097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260802.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 90898097 is about 9534.0493495681. The cubic root of 90898097 is about 449.6261866800.

The spelling of 90898097 in words is "ninety million, eight hundred ninety-eight thousand, ninety-seven".