70645879 has 2 divisors, whose sum is σ = 70645880. Its totient is φ = 70645878.

The previous prime is 70645877. The next prime is 70645889. The reversal of 70645879 is 97854607.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97854607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70645879 - 2¹ = 70645877 is a prime.

Together with 70645877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70645877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35322939 + 35322940.

It is an arithmetic number, because the mean of its divisors is an integer number (35322940).

Almost surely, 2^70645879 is an apocalyptic number.

70645879 is a deficient number, since it is larger than the sum of its proper divisors (1).

70645879 is an equidigital number, since it uses as much as digits as its factorization.

70645879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 70645879 is about 8405.1102907695. The cubic root of 70645879 is about 413.3921997469.

The spelling of 70645879 in words is "seventy million, six hundred forty-five thousand, eight hundred seventy-nine".