77075409 has 8 divisors (see below), whose sum is σ = 104706432. Its totient is φ = 50414000.

The previous prime is 77075407. The next prime is 77075413. The reversal of 77075409 is 90457077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77075409 - 2¹ = 77075407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77075407) 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 7 ways as a sum of consecutive naturals, for example, 242217 + ... + 242534.

It is an arithmetic number, because the mean of its divisors is an integer number (13088304).

Almost surely, 2^77075409 is an apocalyptic number.

It is an amenable number.

77075409 is a deficient number, since it is larger than the sum of its proper divisors (27631023).

77075409 is a wasteful number, since it uses less digits than its factorization.

77075409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484807.

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 77075409 is about 8779.2601624510. The cubic root of 77075409 is about 425.5709217542.

The spelling of 77075409 in words is "seventy-seven million, seventy-five thousand, four hundred nine".