67977563 has 4 divisors (see below), whose sum is σ = 68170488. Its totient is φ = 67784640.

The previous prime is 67977541. The next prime is 67977583. The reversal of 67977563 is 36577976.

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 67977563 - 2¹⁸ = 67715419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (67977583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95933 + ... + 96638.

It is an arithmetic number, because the mean of its divisors is an integer number (17042622).

Almost surely, 2^67977563 is an apocalyptic number.

67977563 is a deficient number, since it is larger than the sum of its proper divisors (192925).

67977563 is a wasteful number, since it uses less digits than its factorization.

67977563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192924.

The product of its digits is 1666980, while the sum is 50.

The square root of 67977563 is about 8244.8506960405. The cubic root of 67977563 is about 408.1206130497.

The spelling of 67977563 in words is "sixty-seven million, nine hundred seventy-seven thousand, five hundred sixty-three".