90078047 has 2 divisors, whose sum is σ = 90078048. Its totient is φ = 90078046.

The previous prime is 90078041. The next prime is 90078049. The reversal of 90078047 is 74087009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90078047 - 2²⁰ = 89029471 is a prime.

It is a super-2 number, since 2×90078047² = 16228109102668418, which contains 22 as substring.

Together with 90078049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90077998 and 90078016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90078041) 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, 45039023 + 45039024.

It is an arithmetic number, because the mean of its divisors is an integer number (45039024).

Almost surely, 2^90078047 is an apocalyptic number.

90078047 is a deficient number, since it is larger than the sum of its proper divisors (1).

90078047 is an equidigital number, since it uses as much as digits as its factorization.

90078047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 90078047 is about 9490.9455271854. The cubic root of 90078047 is about 448.2699780417.

The spelling of 90078047 in words is "ninety million, seventy-eight thousand, forty-seven".