67977961 has 4 divisors (see below), whose sum is σ = 68088400. Its totient is φ = 67867524.

The previous prime is 67977937. The next prime is 67977967. The reversal of 67977961 is 16977976.

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 a cyclic number.

It is not a de Polignac number, because 67977961 - 2⁵ = 67977929 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 67977899 and 67977908.

It is not an unprimeable number, because it can be changed into a prime (67977967) 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, 54291 + ... + 55528.

It is an arithmetic number, because the mean of its divisors is an integer number (17022100).

Almost surely, 2^67977961 is an apocalyptic number.

It is an amenable number.

67977961 is a deficient number, since it is larger than the sum of its proper divisors (110439).

67977961 is a wasteful number, since it uses less digits than its factorization.

67977961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110438.

The product of its digits is 1000188, while the sum is 52.

The square root of 67977961 is about 8244.8748322822. The cubic root of 67977961 is about 408.1214095462.

The spelling of 67977961 in words is "sixty-seven million, nine hundred seventy-seven thousand, nine hundred sixty-one".