971661323 has 2 divisors, whose sum is σ = 971661324. Its totient is φ = 971661322.

The previous prime is 971661287. The next prime is 971661373. The reversal of 971661323 is 323166179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971661323 - 2⁶ = 971661259 is a prime.

It is a super-2 number, since 2×971661323² = 1888251453228220658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (971661373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485830661 + 485830662.

It is an arithmetic number, because the mean of its divisors is an integer number (485830662).

Almost surely, 2^971661323 is an apocalyptic number.

971661323 is a deficient number, since it is larger than the sum of its proper divisors (1).

971661323 is an equidigital number, since it uses as much as digits as its factorization.

971661323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 971661323 is about 31171.4825281057. The cubic root of 971661323 is about 990.4631112195.

It can be divided in two parts, 97166 and 1323, that added together give a palindrome (98489).

The spelling of 971661323 in words is "nine hundred seventy-one million, six hundred sixty-one thousand, three hundred twenty-three".