971086651 has 2 divisors, whose sum is σ = 971086652. Its totient is φ = 971086650.

The previous prime is 971086639. The next prime is 971086709. The reversal of 971086651 is 156680179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971086651 - 2¹⁵ = 971053883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 971086598 and 971086607.

It is not a weakly prime, because it can be changed into another prime (971086351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485543325 + 485543326.

It is an arithmetic number, because the mean of its divisors is an integer number (485543326).

Almost surely, 2^971086651 is an apocalyptic number.

971086651 is a deficient number, since it is larger than the sum of its proper divisors (1).

971086651 is an equidigital number, since it uses as much as digits as its factorization.

971086651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 971086651 is about 31162.2632522094. The cubic root of 971086651 is about 990.2678087161.

The spelling of 971086651 in words is "nine hundred seventy-one million, eighty-six thousand, six hundred fifty-one".