70839983 has 2 divisors, whose sum is σ = 70839984. Its totient is φ = 70839982.

The previous prime is 70839949. The next prime is 70840009. The reversal of 70839983 is 38993807.

It is a strong prime.

It is an emirp because it is prime and its reverse (38993807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70839983 - 2¹⁰ = 70838959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70839913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35419991 + 35419992.

It is an arithmetic number, because the mean of its divisors is an integer number (35419992).

Almost surely, 2^70839983 is an apocalyptic number.

70839983 is a deficient number, since it is larger than the sum of its proper divisors (1).

70839983 is an equidigital number, since it uses as much as digits as its factorization.

70839983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 70839983 is about 8416.6491550973. The cubic root of 70839983 is about 413.7704605575.

The spelling of 70839983 in words is "seventy million, eight hundred thirty-nine thousand, nine hundred eighty-three".