170390856943 has 2 divisors, whose sum is σ = 170390856944. Its totient is φ = 170390856942.

The previous prime is 170390856901. The next prime is 170390856947. The reversal of 170390856943 is 349658093071.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 170390856943 - 2⁹ = 170390856431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170390856947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85195428471 + 85195428472.

It is an arithmetic number, because the mean of its divisors is an integer number (85195428472).

Almost surely, 2^170390856943 is an apocalyptic number.

170390856943 is a deficient number, since it is larger than the sum of its proper divisors (1).

170390856943 is an equidigital number, since it uses as much as digits as its factorization.

170390856943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 170390856943 in words is "one hundred seventy billion, three hundred ninety million, eight hundred fifty-six thousand, nine hundred forty-three".