70791647 has 2 divisors, whose sum is σ = 70791648. Its totient is φ = 70791646.

The previous prime is 70791641. The next prime is 70791649. The reversal of 70791647 is 74619707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70791647 - 2⁶ = 70791583 is a prime.

It is a super-2 number, since 2×70791647² = 10022914569945218, which contains 22 as substring.

Together with 70791649, 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 (70791641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35395823 + 35395824.

It is an arithmetic number, because the mean of its divisors is an integer number (35395824).

Almost surely, 2^70791647 is an apocalyptic number.

70791647 is a deficient number, since it is larger than the sum of its proper divisors (1).

70791647 is an equidigital number, since it uses as much as digits as its factorization.

70791647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 70791647 is about 8413.7772135944. Note that the first 3 decimals coincide. The cubic root of 70791647 is about 413.6763302905.

The spelling of 70791647 in words is "seventy million, seven hundred ninety-one thousand, six hundred forty-seven".