90054779 has 2 divisors, whose sum is σ = 90054780. Its totient is φ = 90054778.

The previous prime is 90054761. The next prime is 90054799. The reversal of 90054779 is 97745009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90054779 is a prime.

It is not a weakly prime, because it can be changed into another prime (90054719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45027389 + 45027390.

It is an arithmetic number, because the mean of its divisors is an integer number (45027390).

Almost surely, 2^90054779 is an apocalyptic number.

90054779 is a deficient number, since it is larger than the sum of its proper divisors (1).

90054779 is an equidigital number, since it uses as much as digits as its factorization.

90054779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 90054779 is about 9489.7196481245. The cubic root of 90054779 is about 448.2313772786.

The spelling of 90054779 in words is "ninety million, fifty-four thousand, seven hundred seventy-nine".