70845839 has 2 divisors, whose sum is σ = 70845840. Its totient is φ = 70845838.

The previous prime is 70845829. The next prime is 70845871. The reversal of 70845839 is 93854807.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70845839 - 2²⁰ = 69797263 is a prime.

It is a super-2 number, since 2×70845839² = 10038265807227842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70845839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70845809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35422919 + 35422920.

It is an arithmetic number, because the mean of its divisors is an integer number (35422920).

Almost surely, 2^70845839 is an apocalyptic number.

70845839 is a deficient number, since it is larger than the sum of its proper divisors (1).

70845839 is an equidigital number, since it uses as much as digits as its factorization.

70845839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 70845839 is about 8416.9970298201. The cubic root of 70845839 is about 413.7818617134.

The spelling of 70845839 in words is "seventy million, eight hundred forty-five thousand, eight hundred thirty-nine".