90979673 has 2 divisors, whose sum is σ = 90979674. Its totient is φ = 90979672.

The previous prime is 90979661. The next prime is 90979687. The reversal of 90979673 is 37697909.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69422224 + 21557449 = 8332^2 + 4643^2 .

It is an emirp because it is prime and its reverse (37697909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90979673 - 2¹⁶ = 90914137 is a prime.

It is not a weakly prime, because it can be changed into another prime (90979643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45489836 + 45489837.

It is an arithmetic number, because the mean of its divisors is an integer number (45489837).

Almost surely, 2^90979673 is an apocalyptic number.

It is an amenable number.

90979673 is a deficient number, since it is larger than the sum of its proper divisors (1).

90979673 is an equidigital number, since it uses as much as digits as its factorization.

90979673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 90979673 is about 9538.3265303721. The cubic root of 90979673 is about 449.7606513172.

The spelling of 90979673 in words is "ninety million, nine hundred seventy-nine thousand, six hundred seventy-three".