77230681 has 4 divisors (see below), whose sum is σ = 84251664. Its totient is φ = 70209700.

The previous prime is 77230679. The next prime is 77230717. The reversal of 77230681 is 18603277.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77230681 - 2¹ = 77230679 is a prime.

It is a super-2 number, since 2×77230681² = 11929156175447522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77230631) 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, 3510475 + ... + 3510496.

It is an arithmetic number, because the mean of its divisors is an integer number (21062916).

Almost surely, 2^77230681 is an apocalyptic number.

It is an amenable number.

77230681 is a deficient number, since it is larger than the sum of its proper divisors (7020983).

77230681 is a wasteful number, since it uses less digits than its factorization.

77230681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020982.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 77230681 is about 8788.0988273915. The cubic root of 77230681 is about 425.8565075434.

The spelling of 77230681 in words is "seventy-seven million, two hundred thirty thousand, six hundred eighty-one".