1200023971 has 2 divisors, whose sum is σ = 1200023972. Its totient is φ = 1200023970.

The previous prime is 1200023969. The next prime is 1200024053. The reversal of 1200023971 is 1793200021.

It is a weak prime.

It is an emirp because it is prime and its reverse (1793200021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200023971 - 2¹ = 1200023969 is a prime.

Together with 1200023969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1200023921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600011985 + 600011986.

It is an arithmetic number, because the mean of its divisors is an integer number (600011986).

Almost surely, 2^1200023971 is an apocalyptic number.

1200023971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200023971 is an equidigital number, since it uses as much as digits as its factorization.

1200023971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1200023971 is about 34641.3621412323. The cubic root of 1200023971 is about 1062.6656449657.

Adding to 1200023971 its reverse (1793200021), we get a palindrome (2993223992).

The spelling of 1200023971 in words is "one billion, two hundred million, twenty-three thousand, nine hundred seventy-one".