76731687 has 12 divisors (see below), whose sum is σ = 112353904. Its totient is φ = 50453280.

The previous prime is 76731661. The next prime is 76731689. The reversal of 76731687 is 78613767.

It is a happy number.

It is not a de Polignac number, because 76731687 - 2¹⁶ = 76666151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76731689) 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 11 ways as a sum of consecutive naturals, for example, 57739 + ... + 59052.

Almost surely, 2^76731687 is an apocalyptic number.

76731687 is a deficient number, since it is larger than the sum of its proper divisors (35622217).

76731687 is a wasteful number, since it uses less digits than its factorization.

76731687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116870 (or 116867 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 76731687 is about 8759.6624934983. The cubic root of 76731687 is about 424.9373600876.

The spelling of 76731687 in words is "seventy-six million, seven hundred thirty-one thousand, six hundred eighty-seven".