77926009 has 4 divisors (see below), whose sum is σ = 89058304. Its totient is φ = 66793716.

The previous prime is 77926007. The next prime is 77926021. The reversal of 77926009 is 90062977.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90062977 = 733 ⋅122869.

It is a cyclic number.

It is not a de Polignac number, because 77926009 - 2¹ = 77926007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77926003) 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, 5566137 + ... + 5566150.

It is an arithmetic number, because the mean of its divisors is an integer number (22264576).

Almost surely, 2^77926009 is an apocalyptic number.

It is an amenable number.

77926009 is a deficient number, since it is larger than the sum of its proper divisors (11132295).

77926009 is a wasteful number, since it uses less digits than its factorization.

77926009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11132294.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 77926009 is about 8827.5709569507. The cubic root of 77926009 is about 427.1307235952.

The spelling of 77926009 in words is "seventy-seven million, nine hundred twenty-six thousand, nine".