70068821 has 4 divisors (see below), whose sum is σ = 70620672. Its totient is φ = 69516972.

The previous prime is 70068811. The next prime is 70068829. The reversal of 70068821 is 12886007.

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 70068821 - 2¹⁸ = 69806677 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 (70068829) 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, 275735 + ... + 275988.

It is an arithmetic number, because the mean of its divisors is an integer number (17655168).

Almost surely, 2^70068821 is an apocalyptic number.

It is an amenable number.

70068821 is a deficient number, since it is larger than the sum of its proper divisors (551851).

70068821 is a wasteful number, since it uses less digits than its factorization.

70068821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551850.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 70068821 is about 8370.7120963512. The cubic root of 70068821 is about 412.2635481118.

The spelling of 70068821 in words is "seventy million, sixty-eight thousand, eight hundred twenty-one".