170900887 has 2 divisors, whose sum is σ = 170900888. Its totient is φ = 170900886.

The previous prime is 170900843. The next prime is 170900903. The reversal of 170900887 is 788009071.

It is a strong prime.

It is an emirp because it is prime and its reverse (788009071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170900887 - 2⁷ = 170900759 is a prime.

It is a super-2 number, since 2×170900887² = 58414226354773538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170900087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85450443 + 85450444.

It is an arithmetic number, because the mean of its divisors is an integer number (85450444).

Almost surely, 2^170900887 is an apocalyptic number.

170900887 is a deficient number, since it is larger than the sum of its proper divisors (1).

170900887 is an equidigital number, since it uses as much as digits as its factorization.

170900887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 170900887 is about 13072.9066010585. The cubic root of 170900887 is about 554.9426524085.

The spelling of 170900887 in words is "one hundred seventy million, nine hundred thousand, eight hundred eighty-seven".