690019730 has 16 divisors (see below), whose sum is σ = 1244761560. Its totient is φ = 275402112.

The previous prime is 690019723. The next prime is 690019741. The reversal of 690019730 is 37910096.

It can be written as a sum of positive squares in 4 ways, for example, as 635392849 + 54626881 = 25207^2 + 7391^2 .

It is a super-2 number, since 2×690019730² = 952254455578545800, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 70925 + ... + 80064.

Almost surely, 2^690019730 is an apocalyptic number.

690019730 is a deficient number, since it is larger than the sum of its proper divisors (554741830).

690019730 is a wasteful number, since it uses less digits than its factorization.

690019730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151453.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 690019730 is about 26268.2266245744. The cubic root of 690019730 is about 883.6640146359.

The spelling of 690019730 in words is "six hundred ninety million, nineteen thousand, seven hundred thirty".