77050081 has 4 divisors (see below), whose sum is σ = 77082772. Its totient is φ = 77017392.

The previous prime is 77050019. The next prime is 77050087. The reversal of 77050081 is 18005077.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18005077 = 2179 ⋅8263.

It can be written as a sum of positive squares in 2 ways, for example, as 28259856 + 48790225 = 5316^2 + 6985^2 .

It is a cyclic number.

It is not a de Polignac number, because 77050081 - 2¹⁷ = 76919009 is a prime.

It is a super-2 number, since 2×77050081² = 11873429964213122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77050087) 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, 12510 + ... + 17623.

It is an arithmetic number, because the mean of its divisors is an integer number (19270693).

Almost surely, 2^77050081 is an apocalyptic number.

It is an amenable number.

77050081 is a deficient number, since it is larger than the sum of its proper divisors (32691).

77050081 is a wasteful number, since it uses less digits than its factorization.

77050081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32690.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 77050081 is about 8777.8175533557. The cubic root of 77050081 is about 425.5243005670.

The spelling of 77050081 in words is "seventy-seven million, fifty thousand, eighty-one".