67821441 has 4 divisors (see below), whose sum is σ = 90428592. Its totient is φ = 45214292.

The previous prime is 67821409. The next prime is 67821463. The reversal of 67821441 is 14412876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67821441 - 2⁵ = 67821409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67821491) 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, 11303571 + ... + 11303576.

It is an arithmetic number, because the mean of its divisors is an integer number (22607148).

Almost surely, 2^67821441 is an apocalyptic number.

It is an amenable number.

67821441 is a deficient number, since it is larger than the sum of its proper divisors (22607151).

67821441 is a wasteful number, since it uses less digits than its factorization.

67821441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22607150.

The product of its digits is 10752, while the sum is 33.

The square root of 67821441 is about 8235.3774048309. The cubic root of 67821441 is about 407.8079341571.

The spelling of 67821441 in words is "sixty-seven million, eight hundred twenty-one thousand, four hundred forty-one".