70471691 has 2 divisors, whose sum is σ = 70471692. Its totient is φ = 70471690.

The previous prime is 70471663. The next prime is 70471693. The reversal of 70471691 is 19617407.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70471691 is a prime.

Together with 70471693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70471693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35235845 + 35235846.

It is an arithmetic number, because the mean of its divisors is an integer number (35235846).

Almost surely, 2^70471691 is an apocalyptic number.

70471691 is a deficient number, since it is larger than the sum of its proper divisors (1).

70471691 is an equidigital number, since it uses as much as digits as its factorization.

70471691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 70471691 is about 8394.7418661922. The cubic root of 70471691 is about 413.0521599840.

The spelling of 70471691 in words is "seventy million, four hundred seventy-one thousand, six hundred ninety-one".