90870497 has 2 divisors, whose sum is σ = 90870498. Its totient is φ = 90870496.

The previous prime is 90870469. The next prime is 90870509. The reversal of 90870497 is 79407809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83247376 + 7623121 = 9124^2 + 2761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90870497 is a prime.

It is not a weakly prime, because it can be changed into another prime (90870467) 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 as a sum of consecutive naturals, namely, 45435248 + 45435249.

It is an arithmetic number, because the mean of its divisors is an integer number (45435249).

Almost surely, 2^90870497 is an apocalyptic number.

It is an amenable number.

90870497 is a deficient number, since it is larger than the sum of its proper divisors (1).

90870497 is an equidigital number, since it uses as much as digits as its factorization.

90870497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 90870497 is about 9532.6017959422. The cubic root of 90870497 is about 449.5806743998.

The spelling of 90870497 in words is "ninety million, eight hundred seventy thousand, four hundred ninety-seven".