90948206191 has 2 divisors, whose sum is σ = 90948206192. Its totient is φ = 90948206190.

The previous prime is 90948206149. The next prime is 90948206203. The reversal of 90948206191 is 19160284909.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19160284909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90948206191 - 2¹³ = 90948197999 is a prime.

It is a super-4 number, since 4×90948206191⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90948296191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45474103095 + 45474103096.

It is an arithmetic number, because the mean of its divisors is an integer number (45474103096).

Almost surely, 2^90948206191 is an apocalyptic number.

90948206191 is a deficient number, since it is larger than the sum of its proper divisors (1).

90948206191 is an equidigital number, since it uses as much as digits as its factorization.

90948206191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 90948206191 in words is "ninety billion, nine hundred forty-eight million, two hundred six thousand, one hundred ninety-one".