70089821 has 4 divisors (see below), whose sum is σ = 70554144. Its totient is φ = 69625500.

The previous prime is 70089779. The next prime is 70089823. The reversal of 70089821 is 12898007.

It is a happy number.

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 70089821 - 2⁶ = 70089757 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 (70089823) 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, 231935 + ... + 232236.

It is an arithmetic number, because the mean of its divisors is an integer number (17638536).

Almost surely, 2^70089821 is an apocalyptic number.

It is an amenable number.

70089821 is a deficient number, since it is larger than the sum of its proper divisors (464323).

70089821 is a wasteful number, since it uses less digits than its factorization.

70089821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464322.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 70089821 is about 8371.9663759478. The cubic root of 70089821 is about 412.3047298606.

The spelling of 70089821 in words is "seventy million, eighty-nine thousand, eight hundred twenty-one".