90197077 has 2 divisors, whose sum is σ = 90197078. Its totient is φ = 90197076.

The previous prime is 90197059. The next prime is 90197111. The reversal of 90197077 is 77079109.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72607441 + 17589636 = 8521^2 + 4194^2 .

It is an emirp because it is prime and its reverse (77079109) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90197077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90197027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45098538 + 45098539.

It is an arithmetic number, because the mean of its divisors is an integer number (45098539).

Almost surely, 2^90197077 is an apocalyptic number.

It is an amenable number.

90197077 is a deficient number, since it is larger than the sum of its proper divisors (1).

90197077 is an equidigital number, since it uses as much as digits as its factorization.

90197077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 90197077 is about 9497.2141704818. The cubic root of 90197077 is about 448.4673405590.

The spelling of 90197077 in words is "ninety million, one hundred ninety-seven thousand, seventy-seven".