971591653 has 2 divisors, whose sum is σ = 971591654. Its totient is φ = 971591652.

The previous prime is 971591641. The next prime is 971591659. The reversal of 971591653 is 356195179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971381889 + 209764 = 31167^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 971591653 - 2¹³ = 971583461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971591659) 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, 485795826 + 485795827.

It is an arithmetic number, because the mean of its divisors is an integer number (485795827).

Almost surely, 2^971591653 is an apocalyptic number.

It is an amenable number.

971591653 is a deficient number, since it is larger than the sum of its proper divisors (1).

971591653 is an equidigital number, since it uses as much as digits as its factorization.

971591653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 46.

The square root of 971591653 is about 31170.3649802180. The cubic root of 971591653 is about 990.4394379455.

The spelling of 971591653 in words is "nine hundred seventy-one million, five hundred ninety-one thousand, six hundred fifty-three".