971365511 has 2 divisors, whose sum is σ = 971365512. Its totient is φ = 971365510.

The previous prime is 971365459. The next prime is 971365543. The reversal of 971365511 is 115563179.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971365511 is a prime.

It is a super-2 number, since 2×971365511² = 1887101911920582242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971385511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485682755 + 485682756.

It is an arithmetic number, because the mean of its divisors is an integer number (485682756).

Almost surely, 2^971365511 is an apocalyptic number.

971365511 is a deficient number, since it is larger than the sum of its proper divisors (1).

971365511 is an equidigital number, since it uses as much as digits as its factorization.

971365511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 971365511 is about 31166.7372530395. The cubic root of 971365511 is about 990.3625890161.

The spelling of 971365511 in words is "nine hundred seventy-one million, three hundred sixty-five thousand, five hundred eleven".