67943421 has 32 divisors (see below), whose sum is σ = 123889920. Its totient is φ = 35836992.

The previous prime is 67943419. The next prime is 67943429. The reversal of 67943421 is 12434976.

It is not a de Polignac number, because 67943421 - 2¹ = 67943419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67943429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11370 + ... + 16283.

It is an arithmetic number, because the mean of its divisors is an integer number (3871560).

Almost surely, 2^67943421 is an apocalyptic number.

It is an amenable number.

67943421 is a deficient number, since it is larger than the sum of its proper divisors (55946499).

67943421 is a wasteful number, since it uses less digits than its factorization.

67943421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27682 (or 27676 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 67943421 is about 8242.7799315522. The cubic root of 67943421 is about 408.0522748764.

It can be divided in two parts, 679 and 43421, that added together give a square (44100 = 210²).

The spelling of 67943421 in words is "sixty-seven million, nine hundred forty-three thousand, four hundred twenty-one".