171420629 has 2 divisors, whose sum is σ = 171420630. Its totient is φ = 171420628.

The previous prime is 171420589. The next prime is 171420643. The reversal of 171420629 is 926024171.

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., 92121604 + 79299025 = 9598^2 + 8905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171420629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171420595 and 171420604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171420659) 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, 85710314 + 85710315.

It is an arithmetic number, because the mean of its divisors is an integer number (85710315).

Almost surely, 2^171420629 is an apocalyptic number.

It is an amenable number.

171420629 is a deficient number, since it is larger than the sum of its proper divisors (1).

171420629 is an equidigital number, since it uses as much as digits as its factorization.

171420629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 171420629 is about 13092.7701041453. The cubic root of 171420629 is about 555.5046450251.

The spelling of 171420629 in words is "one hundred seventy-one million, four hundred twenty thousand, six hundred twenty-nine".