76687749 has 32 divisors (see below), whose sum is σ = 116288000. Its totient is φ = 49937472.

The previous prime is 76687747. The next prime is 76687771. The reversal of 76687749 is 94778667.

It is not a de Polignac number, because 76687749 - 2¹ = 76687747 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76687695 and 76687704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76687747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 334767 + ... + 334995.

It is an arithmetic number, because the mean of its divisors is an integer number (3634000).

Almost surely, 2^76687749 is an apocalyptic number.

76687749 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

76687749 is a deficient number, since it is larger than the sum of its proper divisors (39600251).

76687749 is a wasteful number, since it uses less digits than its factorization.

76687749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 468 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 76687749 is about 8757.1541610274. The cubic root of 76687749 is about 424.8562355728.

The spelling of 76687749 in words is "seventy-six million, six hundred eighty-seven thousand, seven hundred forty-nine".