900505493 has 2 divisors, whose sum is σ = 900505494. Its totient is φ = 900505492.

The previous prime is 900505483. The next prime is 900505531. The reversal of 900505493 is 394505009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899580049 + 925444 = 29993^2 + 962^2 .

It is a cyclic number.

It is not a de Polignac number, because 900505493 - 2⁸ = 900505237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900505423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450252746 + 450252747.

It is an arithmetic number, because the mean of its divisors is an integer number (450252747).

Almost surely, 2^900505493 is an apocalyptic number.

It is an amenable number.

900505493 is a deficient number, since it is larger than the sum of its proper divisors (1).

900505493 is an equidigital number, since it uses as much as digits as its factorization.

900505493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 900505493 is about 30008.4237006878. The cubic root of 900505493 is about 965.6701093396.

The spelling of 900505493 in words is "nine hundred million, five hundred five thousand, four hundred ninety-three".