971578451 has 2 divisors, whose sum is σ = 971578452. Its totient is φ = 971578450.

The previous prime is 971578417. The next prime is 971578453. The reversal of 971578451 is 154875179.

It is a strong prime.

It is an emirp because it is prime and its reverse (154875179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971578451 - 2¹⁰ = 971577427 is a prime.

Together with 971578453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 971578396 and 971578405.

It is not a weakly prime, because it can be changed into another prime (971578453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485789225 + 485789226.

It is an arithmetic number, because the mean of its divisors is an integer number (485789226).

Almost surely, 2^971578451 is an apocalyptic number.

971578451 is a deficient number, since it is larger than the sum of its proper divisors (1).

971578451 is an equidigital number, since it uses as much as digits as its factorization.

971578451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 47.

The square root of 971578451 is about 31170.1532078365. The cubic root of 971578451 is about 990.4349518905.

The spelling of 971578451 in words is "nine hundred seventy-one million, five hundred seventy-eight thousand, four hundred fifty-one".