70849979 has 2 divisors, whose sum is σ = 70849980. Its totient is φ = 70849978.

The previous prime is 70849957. The next prime is 70849997. The reversal of 70849979 is 97994807.

Together with next prime (70849997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70849979 - 2¹² = 70845883 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70849979.

It is not a weakly prime, because it can be changed into another prime (70849949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35424989 + 35424990.

It is an arithmetic number, because the mean of its divisors is an integer number (35424990).

Almost surely, 2^70849979 is an apocalyptic number.

70849979 is a deficient number, since it is larger than the sum of its proper divisors (1).

70849979 is an equidigital number, since it uses as much as digits as its factorization.

70849979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 70849979 is about 8417.2429571683. The cubic root of 70849979 is about 413.7899215776.

The spelling of 70849979 in words is "seventy million, eight hundred forty-nine thousand, nine hundred seventy-nine".