711985969 has 2 divisors, whose sum is σ = 711985970. Its totient is φ = 711985968.

The previous prime is 711985949. The next prime is 711985987. The reversal of 711985969 is 969589117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578883600 + 133102369 = 24060^2 + 11537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-711985969 is a prime.

It is a super-2 number, since 2×711985969² = 1013848040105737922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (711985909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355992984 + 355992985.

It is an arithmetic number, because the mean of its divisors is an integer number (355992985).

Almost surely, 2^711985969 is an apocalyptic number.

It is an amenable number.

711985969 is a deficient number, since it is larger than the sum of its proper divisors (1).

711985969 is an equidigital number, since it uses as much as digits as its factorization.

711985969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 55.

The square root of 711985969 is about 26683.0652099792. The cubic root of 711985969 is about 892.9431534568.

The spelling of 711985969 in words is "seven hundred eleven million, nine hundred eighty-five thousand, nine hundred sixty-nine".