70840817 has 4 divisors (see below), whose sum is σ = 70935156. Its totient is φ = 70746480.

The previous prime is 70840813. The next prime is 70840831. The reversal of 70840817 is 71804807.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35331136 + 35509681 = 5944^2 + 5959^2 .

It is a cyclic number.

It is not a de Polignac number, because 70840817 - 2² = 70840813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70840813) 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, 46034 + ... + 47547.

It is an arithmetic number, because the mean of its divisors is an integer number (17733789).

Almost surely, 2^70840817 is an apocalyptic number.

It is an amenable number.

70840817 is a deficient number, since it is larger than the sum of its proper divisors (94339).

70840817 is an equidigital number, since it uses as much as digits as its factorization.

70840817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94338.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 70840817 is about 8416.6986996090. The cubic root of 70840817 is about 413.7720843261.

The spelling of 70840817 in words is "seventy million, eight hundred forty thousand, eight hundred seventeen".