90100079 has 2 divisors, whose sum is σ = 90100080. Its totient is φ = 90100078.

The previous prime is 90100063. The next prime is 90100103. The reversal of 90100079 is 97000109.

It is a weak prime.

It is an emirp because it is prime and its reverse (97000109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90100079 - 2⁴ = 90100063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90100009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45050039 + 45050040.

It is an arithmetic number, because the mean of its divisors is an integer number (45050040).

Almost surely, 2^90100079 is an apocalyptic number.

90100079 is a deficient number, since it is larger than the sum of its proper divisors (1).

90100079 is an equidigital number, since it uses as much as digits as its factorization.

90100079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90100079 is about 9492.1061414209. The cubic root of 90100079 is about 448.3065221994.

The spelling of 90100079 in words is "ninety million, one hundred thousand, seventy-nine".