90236427847 has 2 divisors, whose sum is σ = 90236427848. Its totient is φ = 90236427846.

The previous prime is 90236427829. The next prime is 90236427851. The reversal of 90236427847 is 74872463209.

It is a strong prime.

It is an emirp because it is prime and its reverse (74872463209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90236427847 - 2⁷ = 90236427719 is a prime.

It is a super-2 number, since 2×90236427847² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90236427794 and 90236427803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90236427887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45118213923 + 45118213924.

It is an arithmetic number, because the mean of its divisors is an integer number (45118213924).

Almost surely, 2^90236427847 is an apocalyptic number.

90236427847 is a deficient number, since it is larger than the sum of its proper divisors (1).

90236427847 is an equidigital number, since it uses as much as digits as its factorization.

90236427847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 90236427847 in words is "ninety billion, two hundred thirty-six million, four hundred twenty-seven thousand, eight hundred forty-seven".