67964391 has 24 divisors (see below), whose sum is σ = 109124496. Its totient is φ = 40410240.

The previous prime is 67964389. The next prime is 67964399. The reversal of 67964391 is 19346976.

It is not a de Polignac number, because 67964391 - 2¹ = 67964389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67964399) 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 23 ways as a sum of consecutive naturals, for example, 1230 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (4546854).

Almost surely, 2^67964391 is an apocalyptic number.

67964391 is a deficient number, since it is larger than the sum of its proper divisors (41160105).

67964391 is a wasteful number, since it uses less digits than its factorization.

67964391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13023 (or 13020 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 67964391 is about 8244.0518557321. The cubic root of 67964391 is about 408.0942508612.

The spelling of 67964391 in words is "sixty-seven million, nine hundred sixty-four thousand, three hundred ninety-one".