978952171 has 2 divisors, whose sum is σ = 978952172. Its totient is φ = 978952170.

The previous prime is 978952129. The next prime is 978952283. The reversal of 978952171 is 171259879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978952171 - 2¹⁷ = 978821099 is a prime.

It is a super-2 number, since 2×978952171² = 1916694706211226482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978952111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489476085 + 489476086.

It is an arithmetic number, because the mean of its divisors is an integer number (489476086).

Almost surely, 2^978952171 is an apocalyptic number.

978952171 is a deficient number, since it is larger than the sum of its proper divisors (1).

978952171 is an equidigital number, since it uses as much as digits as its factorization.

978952171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 49.

The square root of 978952171 is about 31288.2113742540. The cubic root of 978952171 is about 992.9342497590.

The spelling of 978952171 in words is "nine hundred seventy-eight million, nine hundred fifty-two thousand, one hundred seventy-one".