690686474 has 16 divisors (see below), whose sum is σ = 1065763656. Its totient is φ = 335462400.

The previous prime is 690686471. The next prime is 690686539. The reversal of 690686474 is 474686096.

It can be written as a sum of positive squares in 4 ways, for example, as 632271025 + 58415449 = 25145^2 + 7643^2 .

It is not an unprimeable number, because it can be changed into a prime (690686471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40154 + ... + 54714.

Almost surely, 2^690686474 is an apocalyptic number.

690686474 is a deficient number, since it is larger than the sum of its proper divisors (375077182).

690686474 is a wasteful number, since it uses less digits than its factorization.

690686474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15241.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 690686474 is about 26280.9146340077. The cubic root of 690686474 is about 883.9485417724.

The spelling of 690686474 in words is "six hundred ninety million, six hundred eighty-six thousand, four hundred seventy-four".