690986071 has 2 divisors, whose sum is σ = 690986072. Its totient is φ = 690986070.

The previous prime is 690986059. The next prime is 690986077. The reversal of 690986071 is 170689096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690986071 - 2¹⁷ = 690854999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690986077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345493035 + 345493036.

It is an arithmetic number, because the mean of its divisors is an integer number (345493036).

Almost surely, 2^690986071 is an apocalyptic number.

690986071 is a deficient number, since it is larger than the sum of its proper divisors (1).

690986071 is an equidigital number, since it uses as much as digits as its factorization.

690986071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 690986071 is about 26286.6139127884. The cubic root of 690986071 is about 884.0763325328.

The spelling of 690986071 in words is "six hundred ninety million, nine hundred eighty-six thousand, seventy-one".