70390321 has 4 divisors (see below), whose sum is σ = 70487872. Its totient is φ = 70292772.

The previous prime is 70390301. The next prime is 70390379. The reversal of 70390321 is 12309307.

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 70390321 - 2⁵ = 70390289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70390301) 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, 47685 + ... + 49138.

It is an arithmetic number, because the mean of its divisors is an integer number (17621968).

Almost surely, 2^70390321 is an apocalyptic number.

It is an amenable number.

70390321 is a deficient number, since it is larger than the sum of its proper divisors (97551).

70390321 is an equidigital number, since it uses as much as digits as its factorization.

70390321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97550.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 70390321 is about 8389.8939802598. The cubic root of 70390321 is about 412.8931221349.

Adding to 70390321 its reverse (12309307), we get a palindrome (82699628).

The spelling of 70390321 in words is "seventy million, three hundred ninety thousand, three hundred twenty-one".