77161009 has 8 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 76330800.

The previous prime is 77161001. The next prime is 77161031. The reversal of 77161009 is 90016177.

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 77161009 - 2³ = 77161001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77161001) 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, 58659 + ... + 59959.

It is an arithmetic number, because the mean of its divisors is an integer number (9749376).

Almost surely, 2^77161009 is an apocalyptic number.

It is an amenable number.

77161009 is a deficient number, since it is larger than the sum of its proper divisors (833999).

77161009 is a wasteful number, since it uses less digits than its factorization.

77161009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 77161009 is about 8784.1339356820. The cubic root of 77161009 is about 425.7284099151.

The spelling of 77161009 in words is "seventy-seven million, one hundred sixty-one thousand, nine".