971287451 has 2 divisors, whose sum is σ = 971287452. Its totient is φ = 971287450.

The previous prime is 971287433. The next prime is 971287453. The reversal of 971287451 is 154782179.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971287451 is a prime.

Together with 971287453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (971287453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485643725 + 485643726.

It is an arithmetic number, because the mean of its divisors is an integer number (485643726).

Almost surely, 2^971287451 is an apocalyptic number.

971287451 is a deficient number, since it is larger than the sum of its proper divisors (1).

971287451 is an equidigital number, since it uses as much as digits as its factorization.

971287451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The square root of 971287451 is about 31165.4849312505. The cubic root of 971287451 is about 990.3360594301.

The spelling of 971287451 in words is "nine hundred seventy-one million, two hundred eighty-seven thousand, four hundred fifty-one".