775478073 has 4 divisors (see below), whose sum is σ = 1033970768. Its totient is φ = 516985380.

The previous prime is 775478063. The next prime is 775478087. The reversal of 775478073 is 370874577.

It is a happy number.

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 775478073 - 2⁴ = 775478057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775478063) 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, 129246343 + ... + 129246348.

It is an arithmetic number, because the mean of its divisors is an integer number (258492692).

Almost surely, 2^775478073 is an apocalyptic number.

It is an amenable number.

775478073 is a deficient number, since it is larger than the sum of its proper divisors (258492695).

775478073 is a wasteful number, since it uses less digits than its factorization.

775478073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258492694.

The product of its (nonzero) digits is 1152480, while the sum is 48.

The square root of 775478073 is about 27847.4069349374. The cubic root of 775478073 is about 918.7341100311.

The spelling of 775478073 in words is "seven hundred seventy-five million, four hundred seventy-eight thousand, seventy-three".