90591143 has 2 divisors, whose sum is σ = 90591144. Its totient is φ = 90591142.

The previous prime is 90591131. The next prime is 90591191. The reversal of 90591143 is 34119509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90591143 - 2¹² = 90587047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90501143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45295571 + 45295572.

It is an arithmetic number, because the mean of its divisors is an integer number (45295572).

Almost surely, 2^90591143 is an apocalyptic number.

90591143 is a deficient number, since it is larger than the sum of its proper divisors (1).

90591143 is an equidigital number, since it uses as much as digits as its factorization.

90591143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 90591143 is about 9517.9379594532. The cubic root of 90591143 is about 449.1195013291.

The spelling of 90591143 in words is "ninety million, five hundred ninety-one thousand, one hundred forty-three".