77161013 has 4 divisors (see below), whose sum is σ = 77244300. Its totient is φ = 77077728.

The previous prime is 77161001. The next prime is 77161031. The reversal of 77161013 is 31016177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31016177 = 17 ⋅1824481.

It can be written as a sum of positive squares in 2 ways, for example, as 25421764 + 51739249 = 5042^2 + 7193^2 .

It is a cyclic number.

It is not a de Polignac number, because 77161013 - 2⁴ = 77160997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161213) 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, 40238 + ... + 42111.

It is an arithmetic number, because the mean of its divisors is an integer number (19311075).

Almost surely, 2^77161013 is an apocalyptic number.

It is an amenable number.

77161013 is a deficient number, since it is larger than the sum of its proper divisors (83287).

77161013 is an equidigital number, since it uses as much as digits as its factorization.

77161013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83286.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 77161013 is about 8784.1341633652. The cubic root of 77161013 is about 425.7284172716.

The spelling of 77161013 in words is "seventy-seven million, one hundred sixty-one thousand, thirteen".