170003993 has 2 divisors, whose sum is σ = 170003994. Its totient is φ = 170003992.

The previous prime is 170003959. The next prime is 170004007. The reversal of 170003993 is 399300071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158961664 + 11042329 = 12608^2 + 3323^2 .

It is an emirp because it is prime and its reverse (399300071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170003993 - 2⁶ = 170003929 is a prime.

It is equal to p_9503276 and since 170003993 and 9503276 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (170003293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85001996 + 85001997.

It is an arithmetic number, because the mean of its divisors is an integer number (85001997).

Almost surely, 2^170003993 is an apocalyptic number.

It is an amenable number.

170003993 is a deficient number, since it is larger than the sum of its proper divisors (1).

170003993 is an equidigital number, since it uses as much as digits as its factorization.

170003993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 170003993 is about 13038.5579340662. The cubic root of 170003993 is about 553.9701628680.

The spelling of 170003993 in words is "one hundred seventy million, three thousand, nine hundred ninety-three".