90495389 has 2 divisors, whose sum is σ = 90495390. Its totient is φ = 90495388.

The previous prime is 90495371. The next prime is 90495421. The reversal of 90495389 is 98359409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45832900 + 44662489 = 6770^2 + 6683^2 .

It is a cyclic number.

It is not a de Polignac number, because 90495389 - 2¹² = 90491293 is a prime.

It is a super-2 number, since 2×90495389² = 16378830860522642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90495329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45247694 + 45247695.

It is an arithmetic number, because the mean of its divisors is an integer number (45247695).

Almost surely, 2^90495389 is an apocalyptic number.

It is an amenable number.

90495389 is a deficient number, since it is larger than the sum of its proper divisors (1).

90495389 is an equidigital number, since it uses as much as digits as its factorization.

90495389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 90495389 is about 9512.9064433537. The cubic root of 90495389 is about 448.9612071583.

The spelling of 90495389 in words is "ninety million, four hundred ninety-five thousand, three hundred eighty-nine".