971021423 has 2 divisors, whose sum is σ = 971021424. Its totient is φ = 971021422.

The previous prime is 971021369. The next prime is 971021431. The reversal of 971021423 is 324120179.

It is a strong prime.

It is an emirp because it is prime and its reverse (324120179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971021423 - 2⁸ = 971021167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971021483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485510711 + 485510712.

It is an arithmetic number, because the mean of its divisors is an integer number (485510712).

Almost surely, 2^971021423 is an apocalyptic number.

971021423 is a deficient number, since it is larger than the sum of its proper divisors (1).

971021423 is an equidigital number, since it uses as much as digits as its factorization.

971021423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 971021423 is about 31161.2166482633. The cubic root of 971021423 is about 990.2456360861.

The spelling of 971021423 in words is "nine hundred seventy-one million, twenty-one thousand, four hundred twenty-three".