90078719 has 2 divisors, whose sum is σ = 90078720. Its totient is φ = 90078718.

The previous prime is 90078673. The next prime is 90078731. The reversal of 90078719 is 91787009.

It is a strong prime.

It is an emirp because it is prime and its reverse (91787009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90078719 is a prime.

It is a super-2 number, since 2×90078719² = 16228351233361922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90078119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45039359 + 45039360.

It is an arithmetic number, because the mean of its divisors is an integer number (45039360).

Almost surely, 2^90078719 is an apocalyptic number.

90078719 is a deficient number, since it is larger than the sum of its proper divisors (1).

90078719 is an equidigital number, since it uses as much as digits as its factorization.

90078719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 90078719 is about 9490.9809292823. The cubic root of 90078719 is about 448.2710927664.

The spelling of 90078719 in words is "ninety million, seventy-eight thousand, seven hundred nineteen".