690727073 has 2 divisors, whose sum is σ = 690727074. Its totient is φ = 690727072.

The previous prime is 690727069. The next prime is 690727097. The reversal of 690727073 is 370727096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549996304 + 140730769 = 23452^2 + 11863^2 .

It is a cyclic number.

It is not a de Polignac number, because 690727073 - 2² = 690727069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690727073.

It is not a weakly prime, because it can be changed into another prime (690727043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345363536 + 345363537.

It is an arithmetic number, because the mean of its divisors is an integer number (345363537).

Almost surely, 2^690727073 is an apocalyptic number.

It is an amenable number.

690727073 is a deficient number, since it is larger than the sum of its proper divisors (1).

690727073 is an equidigital number, since it uses as much as digits as its factorization.

690727073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 690727073 is about 26281.6870272819. The cubic root of 690727073 is about 883.9658611230.

The spelling of 690727073 in words is "six hundred ninety million, seven hundred twenty-seven thousand, seventy-three".