90611534197 has 2 divisors, whose sum is σ = 90611534198. Its totient is φ = 90611534196.

The previous prime is 90611534149. The next prime is 90611534239. The reversal of 90611534197 is 79143511609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90604612036 + 6922161 = 301006^2 + 2631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90611534197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90611544197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45305767098 + 45305767099.

It is an arithmetic number, because the mean of its divisors is an integer number (45305767099).

Almost surely, 2^90611534197 is an apocalyptic number.

It is an amenable number.

90611534197 is a deficient number, since it is larger than the sum of its proper divisors (1).

90611534197 is an equidigital number, since it uses as much as digits as its factorization.

90611534197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 90611534197 in words is "ninety billion, six hundred eleven million, five hundred thirty-four thousand, one hundred ninety-seven".