971488157 has 2 divisors, whose sum is σ = 971488158. Its totient is φ = 971488156.

The previous prime is 971488109. The next prime is 971488163. The reversal of 971488157 is 751884179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899340121 + 72148036 = 29989^2 + 8494^2 .

It is an emirp because it is prime and its reverse (751884179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971488157 - 2¹⁴ = 971471773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971488187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485744078 + 485744079.

It is an arithmetic number, because the mean of its divisors is an integer number (485744079).

Almost surely, 2^971488157 is an apocalyptic number.

It is an amenable number.

971488157 is a deficient number, since it is larger than the sum of its proper divisors (1).

971488157 is an equidigital number, since it uses as much as digits as its factorization.

971488157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 50.

The square root of 971488157 is about 31168.7047693676. The cubic root of 971488157 is about 990.4042687947.

The spelling of 971488157 in words is "nine hundred seventy-one million, four hundred eighty-eight thousand, one hundred fifty-seven".