77247081 has 16 divisors (see below), whose sum is σ = 114576000. Its totient is φ = 51436944.

The previous prime is 77247073. The next prime is 77247091. The reversal of 77247081 is 18074277.

It is not a de Polignac number, because 77247081 - 2³ = 77247073 is a prime.

It is a super-2 number, since 2×77247081² = 11934223046041122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77247061) 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 15 ways as a sum of consecutive naturals, for example, 40900 + ... + 42746.

It is an arithmetic number, because the mean of its divisors is an integer number (7161000).

Almost surely, 2^77247081 is an apocalyptic number.

It is an amenable number.

77247081 is a deficient number, since it is larger than the sum of its proper divisors (37328919).

77247081 is a wasteful number, since it uses less digits than its factorization.

77247081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 77247081 is about 8789.0318579466. The cubic root of 77247081 is about 425.8866490723.

The spelling of 77247081 in words is "seventy-seven million, two hundred forty-seven thousand, eighty-one".