90554239 has 2 divisors, whose sum is σ = 90554240. Its totient is φ = 90554238.

The previous prime is 90554227. The next prime is 90554267. The reversal of 90554239 is 93245509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90554239 - 2⁷ = 90554111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90554198 and 90554207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90554839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45277119 + 45277120.

It is an arithmetic number, because the mean of its divisors is an integer number (45277120).

Almost surely, 2^90554239 is an apocalyptic number.

90554239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90554239 is an equidigital number, since it uses as much as digits as its factorization.

90554239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 90554239 is about 9515.9991067675. Note that the first 3 decimals coincide. The cubic root of 90554239 is about 449.0585072972.

The spelling of 90554239 in words is "ninety million, five hundred fifty-four thousand, two hundred thirty-nine".