76368781 has 4 divisors (see below), whose sum is σ = 76428000. Its totient is φ = 76309564.

The previous prime is 76368769. The next prime is 76368793. The reversal of 76368781 is 18786367.

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 an interprime number because it is at equal distance from previous prime (76368769) and next prime (76368793).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76368781 is a prime.

It is a super-2 number, since 2×76368781² = 11664381422851922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76368751) 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, 27631 + ... + 30268.

It is an arithmetic number, because the mean of its divisors is an integer number (19107000).

Almost surely, 2^76368781 is an apocalyptic number.

It is an amenable number.

76368781 is a deficient number, since it is larger than the sum of its proper divisors (59219).

76368781 is a wasteful number, since it uses less digits than its factorization.

76368781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59218.

The product of its digits is 338688, while the sum is 46.

The square root of 76368781 is about 8738.9233318527. The cubic root of 76368781 is about 424.2663809805.

The spelling of 76368781 in words is "seventy-six million, three hundred sixty-eight thousand, seven hundred eighty-one".