67964521 has 8 divisors (see below), whose sum is σ = 72036864. Its totient is φ = 63900480.

The previous prime is 67964513. The next prime is 67964527. The reversal of 67964521 is 12546976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67964521 - 2³ = 67964513 is a prime.

It is a super-2 number, since 2×67964521² = 9238352229518882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67964527) 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 7 ways as a sum of consecutive naturals, for example, 24936 + ... + 27526.

It is an arithmetic number, because the mean of its divisors is an integer number (9004608).

Almost surely, 2^67964521 is an apocalyptic number.

It is an amenable number.

67964521 is a deficient number, since it is larger than the sum of its proper divisors (4072343).

67964521 is a wasteful number, since it uses less digits than its factorization.

67964521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its digits is 90720, while the sum is 40.

The square root of 67964521 is about 8244.0597402008. The cubic root of 67964521 is about 408.0945110574.

The spelling of 67964521 in words is "sixty-seven million, nine hundred sixty-four thousand, five hundred twenty-one".