77296081 has 4 divisors (see below), whose sum is σ = 77444964. Its totient is φ = 77147200.

The previous prime is 77296061. The next prime is 77296097. The reversal of 77296081 is 18069277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23126481 + 54169600 = 4809^2 + 7360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77296081 is a prime.

It is a super-2 number, since 2×77296081² = 11949368275917122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77296001) 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, 73660 + ... + 74701.

It is an arithmetic number, because the mean of its divisors is an integer number (19361241).

Almost surely, 2^77296081 is an apocalyptic number.

It is an amenable number.

77296081 is a deficient number, since it is larger than the sum of its proper divisors (148883).

77296081 is a wasteful number, since it uses less digits than its factorization.

77296081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148882.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 77296081 is about 8791.8189813030. The cubic root of 77296081 is about 425.9766806723.

The spelling of 77296081 in words is "seventy-seven million, two hundred ninety-six thousand, eighty-one".