775730899 has 4 divisors (see below), whose sum is σ = 776100136. Its totient is φ = 775361664.

The previous prime is 775730869. The next prime is 775730903. The reversal of 775730899 is 998037577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998037577 = 1237 ⋅806821.

It is a cyclic number.

It is not a de Polignac number, because 775730899 - 2⁷ = 775730771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775730869) 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, 181449 + ... + 185674.

It is an arithmetic number, because the mean of its divisors is an integer number (194025034).

Almost surely, 2^775730899 is an apocalyptic number.

775730899 is a deficient number, since it is larger than the sum of its proper divisors (369237).

775730899 is a wasteful number, since it uses less digits than its factorization.

775730899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369236.

The product of its (nonzero) digits is 3333960, while the sum is 55.

The square root of 775730899 is about 27851.9460540911. The cubic root of 775730899 is about 918.8339429125.

The spelling of 775730899 in words is "seven hundred seventy-five million, seven hundred thirty thousand, eight hundred ninety-nine".