70939171 has 2 divisors, whose sum is σ = 70939172. Its totient is φ = 70939170.

The previous prime is 70939163. The next prime is 70939213. The reversal of 70939171 is 17193907.

It is a weak prime.

It is an emirp because it is prime and its reverse (17193907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70939171 - 2³ = 70939163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70939171.

It is not a weakly prime, because it can be changed into another prime (70939111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35469585 + 35469586.

It is an arithmetic number, because the mean of its divisors is an integer number (35469586).

Almost surely, 2^70939171 is an apocalyptic number.

70939171 is a deficient number, since it is larger than the sum of its proper divisors (1).

70939171 is an equidigital number, since it uses as much as digits as its factorization.

70939171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 70939171 is about 8422.5394626561. The cubic root of 70939171 is about 413.9634867873.

The spelling of 70939171 in words is "seventy million, nine hundred thirty-nine thousand, one hundred seventy-one".