690767321843 has 2 divisors, whose sum is σ = 690767321844. Its totient is φ = 690767321842.

The previous prime is 690767321767. The next prime is 690767321851. The reversal of 690767321843 is 348123767096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690767321843 is a prime.

It is not a weakly prime, because it can be changed into another prime (690767321243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345383660921 + 345383660922.

It is an arithmetic number, because the mean of its divisors is an integer number (345383660922).

Almost surely, 2^690767321843 is an apocalyptic number.

690767321843 is a deficient number, since it is larger than the sum of its proper divisors (1).

690767321843 is an equidigital number, since it uses as much as digits as its factorization.

690767321843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 690767321843 in words is "six hundred ninety billion, seven hundred sixty-seven million, three hundred twenty-one thousand, eight hundred forty-three".