90519397 has 2 divisors, whose sum is σ = 90519398. Its totient is φ = 90519396.

The previous prime is 90519383. The next prime is 90519409. The reversal of 90519397 is 79391509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67469796 + 23049601 = 8214^2 + 4801^2 .

It is a cyclic number.

It is not a de Polignac number, because 90519397 - 2⁷ = 90519269 is a prime.

It is a super-2 number, since 2×90519397² = 16387522466487218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90519347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45259698 + 45259699.

It is an arithmetic number, because the mean of its divisors is an integer number (45259699).

Almost surely, 2^90519397 is an apocalyptic number.

It is an amenable number.

90519397 is a deficient number, since it is larger than the sum of its proper divisors (1).

90519397 is an equidigital number, since it uses as much as digits as its factorization.

90519397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 90519397 is about 9514.1682242853. The cubic root of 90519397 is about 449.0009060783. Note that the first 3 decimals are identical.

It can be divided in two parts, 905 and 19397, that added together give a palindrome (20302).

The spelling of 90519397 in words is "ninety million, five hundred nineteen thousand, three hundred ninety-seven".