90100447 has 2 divisors, whose sum is σ = 90100448. Its totient is φ = 90100446.

The previous prime is 90100397. The next prime is 90100463. The reversal of 90100447 is 74400109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90100447 - 2⁷ = 90100319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90100547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45050223 + 45050224.

It is an arithmetic number, because the mean of its divisors is an integer number (45050224).

Almost surely, 2^90100447 is an apocalyptic number.

90100447 is a deficient number, since it is larger than the sum of its proper divisors (1).

90100447 is an equidigital number, since it uses as much as digits as its factorization.

90100447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 90100447 is about 9492.1255259294. The cubic root of 90100447 is about 448.3071325451.

The spelling of 90100447 in words is "ninety million, one hundred thousand, four hundred forty-seven".