971497663 has 2 divisors, whose sum is σ = 971497664. Its totient is φ = 971497662.

The previous prime is 971497649. The next prime is 971497673. The reversal of 971497663 is 366794179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971497663 - 2²⁵ = 937943231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971497663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971497633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485748831 + 485748832.

It is an arithmetic number, because the mean of its divisors is an integer number (485748832).

Almost surely, 2^971497663 is an apocalyptic number.

971497663 is a deficient number, since it is larger than the sum of its proper divisors (1).

971497663 is an equidigital number, since it uses as much as digits as its factorization.

971497663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 52.

The square root of 971497663 is about 31168.8572616963. The cubic root of 971497663 is about 990.4074991488.

The spelling of 971497663 in words is "nine hundred seventy-one million, four hundred ninety-seven thousand, six hundred sixty-three".