775849197 has 4 divisors (see below), whose sum is σ = 1034465600. Its totient is φ = 517232796.

The previous prime is 775849171. The next prime is 775849201. The reversal of 775849197 is 791948577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 775849197 - 2¹⁸ = 775587053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775849127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129308197 + ... + 129308202.

It is an arithmetic number, because the mean of its divisors is an integer number (258616400).

Almost surely, 2^775849197 is an apocalyptic number.

It is an amenable number.

775849197 is a deficient number, since it is larger than the sum of its proper divisors (258616403).

775849197 is a wasteful number, since it uses less digits than its factorization.

775849197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258616402.

The product of its digits is 4445280, while the sum is 57.

The square root of 775849197 is about 27854.0696667471. The cubic root of 775849197 is about 918.8806475507.

The spelling of 775849197 in words is "seven hundred seventy-five million, eight hundred forty-nine thousand, one hundred ninety-seven".