90563197 has 2 divisors, whose sum is σ = 90563198. Its totient is φ = 90563196.

The previous prime is 90563189. The next prime is 90563227. The reversal of 90563197 is 79136509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 1052676 = 9461^2 + 1026^2 .

It is an emirp because it is prime and its reverse (79136509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90563197 - 2³ = 90563189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90563147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45281598 + 45281599.

It is an arithmetic number, because the mean of its divisors is an integer number (45281599).

Almost surely, 2^90563197 is an apocalyptic number.

It is an amenable number.

90563197 is a deficient number, since it is larger than the sum of its proper divisors (1).

90563197 is an equidigital number, since it uses as much as digits as its factorization.

90563197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 90563197 is about 9516.4697761302. The cubic root of 90563197 is about 449.0733143842.

The spelling of 90563197 in words is "ninety million, five hundred sixty-three thousand, one hundred ninety-seven".