689355502831 has 2 divisors, whose sum is σ = 689355502832. Its totient is φ = 689355502830.

The previous prime is 689355502819. The next prime is 689355502837. The reversal of 689355502831 is 138205553986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689355502831 - 2¹¹ = 689355500783 is a prime.

It is a super-2 number, since 2×689355502831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689355502837) 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, 344677751415 + 344677751416.

It is an arithmetic number, because the mean of its divisors is an integer number (344677751416).

Almost surely, 2^689355502831 is an apocalyptic number.

689355502831 is a deficient number, since it is larger than the sum of its proper divisors (1).

689355502831 is an equidigital number, since it uses as much as digits as its factorization.

689355502831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 689355502831 in words is "six hundred eighty-nine billion, three hundred fifty-five million, five hundred two thousand, eight hundred thirty-one".