170426993 has 16 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 152636880.

The previous prime is 170426953. The next prime is 170426999. The reversal of 170426993 is 399624071.

It is not a de Polignac number, because 170426993 - 2⁶ = 170426929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 170426993.

It is not an unprimeable number, because it can be changed into a prime (170426999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406538 + ... + 406956.

It is an arithmetic number, because the mean of its divisors is an integer number (11793600).

Almost surely, 2^170426993 is an apocalyptic number.

It is an amenable number.

170426993 is a deficient number, since it is larger than the sum of its proper divisors (18270607).

170426993 is a wasteful number, since it uses less digits than its factorization.

170426993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 170426993 is about 13054.7689753592. The cubic root of 170426993 is about 554.4292409010.

The spelling of 170426993 in words is "one hundred seventy million, four hundred twenty-six thousand, nine hundred ninety-three".