90543434599 has 2 divisors, whose sum is σ = 90543434600. Its totient is φ = 90543434598.

The previous prime is 90543434593. The next prime is 90543434609. The reversal of 90543434599 is 99543434509.

It is a weak prime.

It is an emirp because it is prime and its reverse (99543434509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90543434599 - 2³ = 90543434591 is a prime.

It is a super-2 number, since 2×90543434599² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90543434591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45271717299 + 45271717300.

It is an arithmetic number, because the mean of its divisors is an integer number (45271717300).

Almost surely, 2^90543434599 is an apocalyptic number.

90543434599 is a deficient number, since it is larger than the sum of its proper divisors (1).

90543434599 is an equidigital number, since it uses as much as digits as its factorization.

90543434599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 55.

The spelling of 90543434599 in words is "ninety billion, five hundred forty-three million, four hundred thirty-four thousand, five hundred ninety-nine".