1395633971 has 2 divisors, whose sum is σ = 1395633972. Its totient is φ = 1395633970.

The previous prime is 1395633937. The next prime is 1395633977. The reversal of 1395633971 is 1793365931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1395633971 - 2⁶ = 1395633907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1395633977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697816985 + 697816986.

It is an arithmetic number, because the mean of its divisors is an integer number (697816986).

Almost surely, 2^1395633971 is an apocalyptic number.

1395633971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395633971 is an equidigital number, since it uses as much as digits as its factorization.

1395633971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 47.

The square root of 1395633971 is about 37358.1847926261. The cubic root of 1395633971 is about 1117.5248195853.

The spelling of 1395633971 in words is "one billion, three hundred ninety-five million, six hundred thirty-three thousand, nine hundred seventy-one".