235207813691 has 2 divisors, whose sum is σ = 235207813692. Its totient is φ = 235207813690.

The previous prime is 235207813679. The next prime is 235207813693. The reversal of 235207813691 is 196318702532.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235207813691 is a prime.

Together with 235207813693, 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 (235207813693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117603906845 + 117603906846.

It is an arithmetic number, because the mean of its divisors is an integer number (117603906846).

Almost surely, 2^235207813691 is an apocalyptic number.

235207813691 is a deficient number, since it is larger than the sum of its proper divisors (1).

235207813691 is an equidigital number, since it uses as much as digits as its factorization.

235207813691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 235207813691 in words is "two hundred thirty-five billion, two hundred seven million, eight hundred thirteen thousand, six hundred ninety-one".