90744869 has 2 divisors, whose sum is σ = 90744870. Its totient is φ = 90744868.

The previous prime is 90744859. The next prime is 90744883. The reversal of 90744869 is 96844709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79887844 + 10857025 = 8938^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 90744869 - 2⁴ = 90744853 is a prime.

It is a super-2 number, since 2×90744869² = 16469262499654322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90744859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45372434 + 45372435.

It is an arithmetic number, because the mean of its divisors is an integer number (45372435).

Almost surely, 2^90744869 is an apocalyptic number.

It is an amenable number.

90744869 is a deficient number, since it is larger than the sum of its proper divisors (1).

90744869 is an equidigital number, since it uses as much as digits as its factorization.

90744869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 90744869 is about 9526.0101301647. The cubic root of 90744869 is about 449.3733978522.

The spelling of 90744869 in words is "ninety million, seven hundred forty-four thousand, eight hundred sixty-nine".