9957297971 has 2 divisors, whose sum is σ = 9957297972. Its totient is φ = 9957297970.

The previous prime is 9957297923. The next prime is 9957298003. The reversal of 9957297971 is 1797927599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9957297971 - 2⁶ = 9957297907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9957297898 and 9957297907.

It is not a weakly prime, because it can be changed into another prime (9957290971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4978648985 + 4978648986.

It is an arithmetic number, because the mean of its divisors is an integer number (4978648986).

Almost surely, 2^9957297971 is an apocalyptic number.

9957297971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9957297971 is an equidigital number, since it uses as much as digits as its factorization.

9957297971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22504230, while the sum is 65.

The square root of 9957297971 is about 99786.2614341273. The cubic root of 9957297971 is about 2151.3636901904.

The spelling of 9957297971 in words is "nine billion, nine hundred fifty-seven million, two hundred ninety-seven thousand, nine hundred seventy-one".