74632321 has 9 divisors (see below), whose sum is σ = 76536579. Its totient is φ = 72774936.

The previous prime is 74632307. The next prime is 74632339. The reversal of 74632321 is 12323647.

The square root of 74632321 is 8639.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 20830096 = 7335^2 + 4564^2 .

It is not a de Polignac number, because 74632321 - 2¹³ = 74624129 is a prime.

It is a Duffinian number.

Its product of digits (6048) is a multiple of the sum of its prime divisors (216).

It is a self number, because there is not a number n which added to its sum of digits gives 74632321.

It is not an unprimeable number, because it can be changed into a prime (74632021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 457786 + ... + 457948.

Almost surely, 2^74632321 is an apocalyptic number.

74632321 is the 8639-th square number.

74632321 is the 4320-th centered octagonal number.

It is an amenable number.

74632321 is a deficient number, since it is larger than the sum of its proper divisors (1904258).

74632321 is an frugal number, since it uses more digits than its factorization.

74632321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 216 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The cubic root of 74632321 is about 421.0260645899.

Adding to 74632321 its reverse (12323647), we get a palindrome (86955968).

The spelling of 74632321 in words is "seventy-four million, six hundred thirty-two thousand, three hundred twenty-one".