171438457 has 2 divisors, whose sum is σ = 171438458. Its totient is φ = 171438456.

The previous prime is 171438437. The next prime is 171438467. The reversal of 171438457 is 754834171.

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., 144096016 + 27342441 = 12004^2 + 5229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171438457 is a prime.

It is a super-2 number, since 2×171438457² = 58782289077081698, which contains 22 as substring.

It is equal to p_9579109 and since 171438457 and 9579109 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 (171438437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85719228 + 85719229.

It is an arithmetic number, because the mean of its divisors is an integer number (85719229).

Almost surely, 2^171438457 is an apocalyptic number.

It is an amenable number.

171438457 is a deficient number, since it is larger than the sum of its proper divisors (1).

171438457 is an equidigital number, since it uses as much as digits as its factorization.

171438457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 171438457 is about 13093.4509202120. The cubic root of 171438457 is about 555.5239021269.

It can be divided in two parts, 17143 and 8457, that added together give a square (25600 = 160²).

The spelling of 171438457 in words is "one hundred seventy-one million, four hundred thirty-eight thousand, four hundred fifty-seven".