971618023 has 2 divisors, whose sum is σ = 971618024. Its totient is φ = 971618022.

The previous prime is 971618009. The next prime is 971618033. The reversal of 971618023 is 320816179.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971618023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971618033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485809011 + 485809012.

It is an arithmetic number, because the mean of its divisors is an integer number (485809012).

Almost surely, 2^971618023 is an apocalyptic number.

971618023 is a deficient number, since it is larger than the sum of its proper divisors (1).

971618023 is an equidigital number, since it uses as much as digits as its factorization.

971618023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 971618023 is about 31170.7879752822. The cubic root of 971618023 is about 990.4483983806.

The spelling of 971618023 in words is "nine hundred seventy-one million, six hundred eighteen thousand, twenty-three".