701991571 has 2 divisors, whose sum is σ = 701991572. Its totient is φ = 701991570.

The previous prime is 701991569. The next prime is 701991607. The reversal of 701991571 is 175199107.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 701991571 - 2¹ = 701991569 is a prime.

Together with 701991569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (701991071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350995785 + 350995786.

It is an arithmetic number, because the mean of its divisors is an integer number (350995786).

Almost surely, 2^701991571 is an apocalyptic number.

701991571 is a deficient number, since it is larger than the sum of its proper divisors (1).

701991571 is an equidigital number, since it uses as much as digits as its factorization.

701991571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 40.

The square root of 701991571 is about 26495.1235324540. The cubic root of 701991571 is about 888.7452634027.

The spelling of 701991571 in words is "seven hundred one million, nine hundred ninety-one thousand, five hundred seventy-one".