90638143 has 2 divisors, whose sum is σ = 90638144. Its totient is φ = 90638142.

The previous prime is 90638129. The next prime is 90638153. The reversal of 90638143 is 34183609.

It is a strong prime.

It is an emirp because it is prime and its reverse (34183609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90638143 - 2¹⁷ = 90507071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90638099 and 90638108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90638153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45319071 + 45319072.

It is an arithmetic number, because the mean of its divisors is an integer number (45319072).

Almost surely, 2^90638143 is an apocalyptic number.

90638143 is a deficient number, since it is larger than the sum of its proper divisors (1).

90638143 is an equidigital number, since it uses as much as digits as its factorization.

90638143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 90638143 is about 9520.4066614825. The cubic root of 90638143 is about 449.1971578065.

The spelling of 90638143 in words is "ninety million, six hundred thirty-eight thousand, one hundred forty-three".