67706987 has 4 divisors (see below), whose sum is σ = 67902456. Its totient is φ = 67511520.

The previous prime is 67706959. The next prime is 67706993. The reversal of 67706987 is 78960776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67706987 - 2⁸ = 67706731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67706887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97214 + ... + 97907.

It is an arithmetic number, because the mean of its divisors is an integer number (16975614).

Almost surely, 2^67706987 is an apocalyptic number.

67706987 is a deficient number, since it is larger than the sum of its proper divisors (195469).

67706987 is a wasteful number, since it uses less digits than its factorization.

67706987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195468.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 67706987 is about 8228.4255480620. The cubic root of 67706987 is about 407.5784023685.

The spelling of 67706987 in words is "sixty-seven million, seven hundred six thousand, nine hundred eighty-seven".