76444509 has 4 divisors (see below), whose sum is σ = 101926016. Its totient is φ = 50963004.

The previous prime is 76444499. The next prime is 76444517. The reversal of 76444509 is 90544467.

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 a de Polignac number, because none of the positive numbers 2^k-76444509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76444519) 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, 12740749 + ... + 12740754.

It is an arithmetic number, because the mean of its divisors is an integer number (25481504).

Almost surely, 2^76444509 is an apocalyptic number.

It is an amenable number.

76444509 is a deficient number, since it is larger than the sum of its proper divisors (25481507).

76444509 is a wasteful number, since it uses less digits than its factorization.

76444509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25481506.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 76444509 is about 8743.2550574714. The cubic root of 76444509 is about 424.4065701616.

The spelling of 76444509 in words is "seventy-six million, four hundred forty-four thousand, five hundred nine".