90899397 has 6 divisors (see below), whose sum is σ = 131299142. Its totient is φ = 60599592.

The previous prime is 90899339. The next prime is 90899407. The reversal of 90899397 is 79399809.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 7834401 = 9114^2 + 2799^2 .

It is not a de Polignac number, because 90899397 - 2⁸ = 90899141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90899327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5049958 + ... + 5049975.

Almost surely, 2^90899397 is an apocalyptic number.

It is an amenable number.

90899397 is a deficient number, since it is larger than the sum of its proper divisors (40399745).

90899397 is a wasteful number, since it uses less digits than its factorization.

90899397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099939 (or 10099936 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 90899397 is about 9534.1175260220. The cubic root of 90899397 is about 449.6283301472.

The spelling of 90899397 in words is "ninety million, eight hundred ninety-nine thousand, three hundred ninety-seven".