978475711 has 2 divisors, whose sum is σ = 978475712. Its totient is φ = 978475710.

The previous prime is 978475709. The next prime is 978475759. The reversal of 978475711 is 117574879.

978475711 = T₂₅₅₃₉ + T₂₅₅₄₀ + T₂₅₅₄₁.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978475711 - 2¹ = 978475709 is a prime.

Together with 978475709, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978475781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489237855 + 489237856.

It is an arithmetic number, because the mean of its divisors is an integer number (489237856).

Almost surely, 2^978475711 is an apocalyptic number.

978475711 is the 25541-st centered triangular number.

978475711 is a deficient number, since it is larger than the sum of its proper divisors (1).

978475711 is an equidigital number, since it uses as much as digits as its factorization.

978475711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 49.

The square root of 978475711 is about 31280.5963977671. The cubic root of 978475711 is about 992.7731352396.

The spelling of 978475711 in words is "nine hundred seventy-eight million, four hundred seventy-five thousand, seven hundred eleven".