70917239 has 2 divisors, whose sum is σ = 70917240. Its totient is φ = 70917238.

The previous prime is 70917229. The next prime is 70917241. The reversal of 70917239 is 93271907.

It is a strong prime.

It is an emirp because it is prime and its reverse (93271907) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70917239 is a prime.

Together with 70917241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70917229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35458619 + 35458620.

It is an arithmetic number, because the mean of its divisors is an integer number (35458620).

Almost surely, 2^70917239 is an apocalyptic number.

70917239 is a deficient number, since it is larger than the sum of its proper divisors (1).

70917239 is an equidigital number, since it uses as much as digits as its factorization.

70917239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 70917239 is about 8421.2373793879. The cubic root of 70917239 is about 413.9208212056.

The spelling of 70917239 in words is "seventy million, nine hundred seventeen thousand, two hundred thirty-nine".