70672321 has 4 divisors (see below), whose sum is σ = 70902832. Its totient is φ = 70441812.

The previous prime is 70672289. The next prime is 70672351. The reversal of 70672321 is 12327607.

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 70672321 - 2⁵ = 70672289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70672321.

It is not an unprimeable number, because it can be changed into a prime (70672351) 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, 114795 + ... + 115408.

It is an arithmetic number, because the mean of its divisors is an integer number (17725708).

Almost surely, 2^70672321 is an apocalyptic number.

It is an amenable number.

70672321 is a deficient number, since it is larger than the sum of its proper divisors (230511).

70672321 is a wasteful number, since it uses less digits than its factorization.

70672321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230510.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 70672321 is about 8406.6831152364. The cubic root of 70672321 is about 413.4437694125.

Adding to 70672321 its reverse (12327607), we get a palindrome (82999928).

The spelling of 70672321 in words is "seventy million, six hundred seventy-two thousand, three hundred twenty-one".