76394509 has 16 divisors (see below), whose sum is σ = 81423360. Its totient is φ = 71568000.

The previous prime is 76394491. The next prime is 76394519. The reversal of 76394509 is 90549367.

It is not a de Polignac number, because 76394509 - 2²¹ = 74297357 is a prime.

It is a super-2 number, since 2×76394509² = 11672242010702162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76394519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133977 + ... + 134545.

It is an arithmetic number, because the mean of its divisors is an integer number (5088960).

Almost surely, 2^76394509 is an apocalyptic number.

It is an amenable number.

76394509 is a deficient number, since it is larger than the sum of its proper divisors (5028851).

76394509 is a wasteful number, since it uses less digits than its factorization.

76394509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

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

The square root of 76394509 is about 8740.3952427794. The cubic root of 76394509 is about 424.3140195564.

The spelling of 76394509 in words is "seventy-six million, three hundred ninety-four thousand, five hundred nine".