90943578941 has 2 divisors, whose sum is σ = 90943578942. Its totient is φ = 90943578940.

The previous prime is 90943578917. The next prime is 90943578961. The reversal of 90943578941 is 14987534909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90483648025 + 459930916 = 300805^2 + 21446^2 .

It is an emirp because it is prime and its reverse (14987534909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90943578941 - 2⁶ = 90943578877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90943578961) 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, 45471789470 + 45471789471.

It is an arithmetic number, because the mean of its divisors is an integer number (45471789471).

Almost surely, 2^90943578941 is an apocalyptic number.

It is an amenable number.

90943578941 is a deficient number, since it is larger than the sum of its proper divisors (1).

90943578941 is an equidigital number, since it uses as much as digits as its factorization.

90943578941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 90943578941 in words is "ninety billion, nine hundred forty-three million, five hundred seventy-eight thousand, nine hundred forty-one".