969538391 has 2 divisors, whose sum is σ = 969538392. Its totient is φ = 969538390.

The previous prime is 969538387. The next prime is 969538393. The reversal of 969538391 is 193835969.

It is a strong prime.

It is an emirp because it is prime and its reverse (193835969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 969538391 - 2² = 969538387 is a prime.

Together with 969538393, 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 (969538393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484769195 + 484769196.

It is an arithmetic number, because the mean of its divisors is an integer number (484769196).

Almost surely, 2^969538391 is an apocalyptic number.

969538391 is a deficient number, since it is larger than the sum of its proper divisors (1).

969538391 is an equidigital number, since it uses as much as digits as its factorization.

969538391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 969538391 is about 31137.4114370479. The cubic root of 969538391 is about 989.7412482292.

The spelling of 969538391 in words is "nine hundred sixty-nine million, five hundred thirty-eight thousand, three hundred ninety-one".