1971361451 has 2 divisors, whose sum is σ = 1971361452. Its totient is φ = 1971361450.

The previous prime is 1971361433. The next prime is 1971361453. The reversal of 1971361451 is 1541631791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1971361451 - 2⁶ = 1971361387 is a prime.

Together with 1971361453, 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 (1971361453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985680725 + 985680726.

It is an arithmetic number, because the mean of its divisors is an integer number (985680726).

Almost surely, 2^1971361451 is an apocalyptic number.

1971361451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971361451 is an equidigital number, since it uses as much as digits as its factorization.

1971361451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 1971361451 is about 44400.0163400871. The cubic root of 1971361451 is about 1253.8783968646.

The spelling of 1971361451 in words is "one billion, nine hundred seventy-one million, three hundred sixty-one thousand, four hundred fifty-one".