775135201 has 4 divisors (see below), whose sum is σ = 775204804. Its totient is φ = 775065600.

The previous prime is 775135199. The next prime is 775135223. The reversal of 775135201 is 102531577.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 407070976 + 368064225 = 20176^2 + 19185^2 .

It is a 3-Lehmer number, since φ(775135201) divides (775135201-1)³.

It is a cyclic number.

It is not a de Polignac number, because 775135201 - 2¹ = 775135199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775135241) 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, 13920 + ... + 41761.

It is an arithmetic number, because the mean of its divisors is an integer number (193801201).

It is a Poulet number, since it divides 2^775135200-1.

Almost surely, 2^775135201 is an apocalyptic number.

775135201 is the 13921-st decagonal number.

It is an amenable number.

775135201 is a deficient number, since it is larger than the sum of its proper divisors (69603).

775135201 is a wasteful number, since it uses less digits than its factorization.

775135201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69602.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 775135201 is about 27841.2499898981. The cubic root of 775135201 is about 918.5986861980.

Adding to 775135201 its reverse (102531577), we get a palindrome (877666778).

The spelling of 775135201 in words is "seven hundred seventy-five million, one hundred thirty-five thousand, two hundred one".