785490553 has 2 divisors, whose sum is σ = 785490554. Its totient is φ = 785490552.

The previous prime is 785490551. The next prime is 785490557. The reversal of 785490553 is 355094587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436099689 + 349390864 = 20883^2 + 18692^2 .

It is a cyclic number.

It is not a de Polignac number, because 785490553 - 2¹ = 785490551 is a prime.

Together with 785490551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (785490551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392745276 + 392745277.

It is an arithmetic number, because the mean of its divisors is an integer number (392745277).

Almost surely, 2^785490553 is an apocalyptic number.

It is an amenable number.

785490553 is a deficient number, since it is larger than the sum of its proper divisors (1).

785490553 is an equidigital number, since it uses as much as digits as its factorization.

785490553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 46.

The square root of 785490553 is about 28026.6043786970. The cubic root of 785490553 is about 922.6712506843.

The spelling of 785490553 in words is "seven hundred eighty-five million, four hundred ninety thousand, five hundred fifty-three".