691063 has 2 divisors, whose sum is σ = 691064. Its totient is φ = 691062.

The previous prime is 691051. The next prime is 691079. The reversal of 691063 is 360196.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 691063 - 2¹⁷ = 559991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345531 + 345532.

It is an arithmetic number, because the mean of its divisors is an integer number (345532).

2⁶⁹¹⁰⁶³ is an apocalyptic number.

691063 is a deficient number, since it is larger than the sum of its proper divisors (1).

691063 is an equidigital number, since it uses as much as digits as its factorization.

691063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 691063 is about 831.3019908553. The cubic root of 691063 is about 88.4109140037.

The spelling of 691063 in words is "six hundred ninety-one thousand, sixty-three".