74067821 has 4 divisors (see below), whose sum is σ = 76069692. Its totient is φ = 72065952.

The previous prime is 74067811. The next prime is 74067859. The reversal of 74067821 is 12876047.

It is a happy number.

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 36735721 + 37332100 = 6061^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 74067821 - 2²⁶ = 6958957 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 (74067811) 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, 1000880 + ... + 1000953.

It is an arithmetic number, because the mean of its divisors is an integer number (19017423).

Almost surely, 2^74067821 is an apocalyptic number.

It is an amenable number.

74067821 is a deficient number, since it is larger than the sum of its proper divisors (2001871).

74067821 is a wasteful number, since it uses less digits than its factorization.

74067821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001870.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 74067821 is about 8606.2663797956. The cubic root of 74067821 is about 419.9618653963.

The spelling of 74067821 in words is "seventy-four million, sixty-seven thousand, eight hundred twenty-one".