193057420691 has 2 divisors, whose sum is σ = 193057420692. Its totient is φ = 193057420690.

The previous prime is 193057420681. The next prime is 193057420709. The reversal of 193057420691 is 196024750391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 193057420691 - 2⁶ = 193057420627 is a prime.

It is not a weakly prime, because it can be changed into another prime (193057420681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96528710345 + 96528710346.

It is an arithmetic number, because the mean of its divisors is an integer number (96528710346).

Almost surely, 2^193057420691 is an apocalyptic number.

193057420691 is a deficient number, since it is larger than the sum of its proper divisors (1).

193057420691 is an equidigital number, since it uses as much as digits as its factorization.

193057420691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 193057420691 in words is "one hundred ninety-three billion, fifty-seven million, four hundred twenty thousand, six hundred ninety-one".