74238047321 has 4 divisors (see below), whose sum is σ = 76048731444. Its totient is φ = 72427363200.

The previous prime is 74238047311. The next prime is 74238047329. The reversal of 74238047321 is 12374083247.

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 32933175625 + 41304871696 = 181475^2 + 203236^2 .

It is a cyclic number.

It is not a de Polignac number, because 74238047321 - 2¹⁸ = 74237785177 is a prime.

It is a super-2 number, since 2×74238047321² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1810684081 = 74238047321 / (7 + 4 + 2 + 3 + 8 + 0 + 4 + 7 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74238047329) 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, 905342000 + ... + 905342081.

It is an arithmetic number, because the mean of its divisors is an integer number (19012182861).

Almost surely, 2^74238047321 is an apocalyptic number.

It is an amenable number.

74238047321 is a deficient number, since it is larger than the sum of its proper divisors (1810684123).

74238047321 is a wasteful number, since it uses less digits than its factorization.

74238047321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810684122.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 74238047321 in words is "seventy-four billion, two hundred thirty-eight million, forty-seven thousand, three hundred twenty-one".