67696391 has 6 divisors (see below), whose sum is σ = 78748920. Its totient is φ = 58025436.

The previous prime is 67696367. The next prime is 67696459. The reversal of 67696391 is 19369676.

It is a happy number.

It is not a de Polignac number, because 67696391 - 2⁶ = 67696327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67696351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 690731 + ... + 690828.

It is an arithmetic number, because the mean of its divisors is an integer number (13124820).

Almost surely, 2^67696391 is an apocalyptic number.

67696391 is a deficient number, since it is larger than the sum of its proper divisors (11052529).

67696391 is a wasteful number, since it uses less digits than its factorization.

67696391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381573 (or 1381566 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The square root of 67696391 is about 8227.7816572877. The cubic root of 67696391 is about 407.5571395404.

The spelling of 67696391 in words is "sixty-seven million, six hundred ninety-six thousand, three hundred ninety-one".