90006403 has 2 divisors, whose sum is σ = 90006404. Its totient is φ = 90006402.

The previous prime is 90006289. The next prime is 90006407. The reversal of 90006403 is 30460009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90006403 - 2⁹ = 90005891 is a prime.

It is not a weakly prime, because it can be changed into another prime (90006407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45003201 + 45003202.

It is an arithmetic number, because the mean of its divisors is an integer number (45003202).

Almost surely, 2^90006403 is an apocalyptic number.

90006403 is a deficient number, since it is larger than the sum of its proper divisors (1).

90006403 is an equidigital number, since it uses as much as digits as its factorization.

90006403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 90006403 is about 9487.1704422341. The cubic root of 90006403 is about 448.1511019721.

It can be divided in two parts, 90006 and 403, that added together give a palindrome (90409).

The spelling of 90006403 in words is "ninety million, six thousand, four hundred three".