90471431 has 2 divisors, whose sum is σ = 90471432. Its totient is φ = 90471430.

The previous prime is 90471413. The next prime is 90471439. The reversal of 90471431 is 13417409.

Together with previous prime (90471413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90471431 - 2¹⁰ = 90470407 is a prime.

It is a super-2 number, since 2×90471431² = 16370159654375522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90471394 and 90471403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90471439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45235715 + 45235716.

It is an arithmetic number, because the mean of its divisors is an integer number (45235716).

Almost surely, 2^90471431 is an apocalyptic number.

90471431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90471431 is an equidigital number, since it uses as much as digits as its factorization.

90471431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 90471431 is about 9511.6471233956. The cubic root of 90471431 is about 448.9215839169.

The spelling of 90471431 in words is "ninety million, four hundred seventy-one thousand, four hundred thirty-one".