775591897 has 4 divisors (see below), whose sum is σ = 776791296. Its totient is φ = 774392500.

The previous prime is 775591853. The next prime is 775591909. The reversal of 775591897 is 798195577.

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 a cyclic number.

It is not a de Polignac number, because 775591897 - 2⁷ = 775591769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775591807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598729 + ... + 600022.

It is an arithmetic number, because the mean of its divisors is an integer number (194197824).

Almost surely, 2^775591897 is an apocalyptic number.

It is an amenable number.

775591897 is a deficient number, since it is larger than the sum of its proper divisors (1199399).

775591897 is a wasteful number, since it uses less digits than its factorization.

775591897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199398.

The product of its digits is 5556600, while the sum is 58.

The square root of 775591897 is about 27849.4505690866. The cubic root of 775591897 is about 918.7790581643.

The spelling of 775591897 in words is "seven hundred seventy-five million, five hundred ninety-one thousand, eight hundred ninety-seven".