90888397 has 2 divisors, whose sum is σ = 90888398. Its totient is φ = 90888396.

The previous prime is 90888383. The next prime is 90888401. The reversal of 90888397 is 79388809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85266756 + 5621641 = 9234^2 + 2371^2 .

It is a cyclic number.

It is not a de Polignac number, because 90888397 - 2¹⁵ = 90855629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90888337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45444198 + 45444199.

It is an arithmetic number, because the mean of its divisors is an integer number (45444199).

Almost surely, 2^90888397 is an apocalyptic number.

It is an amenable number.

90888397 is a deficient number, since it is larger than the sum of its proper divisors (1).

90888397 is an equidigital number, since it uses as much as digits as its factorization.

90888397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 90888397 is about 9533.5406329443. The cubic root of 90888397 is about 449.6101924722.

The spelling of 90888397 in words is "ninety million, eight hundred eighty-eight thousand, three hundred ninety-seven".