67946405 has 4 divisors (see below), whose sum is σ = 81535692. Its totient is φ = 54357120.

The previous prime is 67946401. The next prime is 67946419. The reversal of 67946405 is 50464976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19518724 + 48427681 = 4418^2 + 6959^2 .

It is not a de Polignac number, because 67946405 - 2² = 67946401 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 (67946401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6794636 + ... + 6794645.

It is an arithmetic number, because the mean of its divisors is an integer number (20383923).

Almost surely, 2^67946405 is an apocalyptic number.

It is an amenable number.

67946405 is a deficient number, since it is larger than the sum of its proper divisors (13589287).

67946405 is a wasteful number, since it uses less digits than its factorization.

67946405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13589286.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 67946405 is about 8242.9609364597. The cubic root of 67946405 is about 408.0582485240.

The spelling of 67946405 in words is "sixty-seven million, nine hundred forty-six thousand, four hundred five".