76394905 has 4 divisors (see below), whose sum is σ = 91673892. Its totient is φ = 61115920.

The previous prime is 76394809. The next prime is 76394909. The reversal of 76394905 is 50949367.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16842816 + 59552089 = 4104^2 + 7717^2 .

It is not a de Polignac number, because 76394905 - 2⁹ = 76394393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76394909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7639486 + ... + 7639495.

It is an arithmetic number, because the mean of its divisors is an integer number (22918473).

Almost surely, 2^76394905 is an apocalyptic number.

It is an amenable number.

76394905 is a deficient number, since it is larger than the sum of its proper divisors (15278987).

76394905 is a wasteful number, since it uses less digits than its factorization.

76394905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278986.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 76394905 is about 8740.4178961878. The cubic root of 76394905 is about 424.3147527158.

It can be divided in two parts, 7639 and 4905, that added together give a square (12544 = 112²).

The spelling of 76394905 in words is "seventy-six million, three hundred ninety-four thousand, nine hundred five".