689543690 has 32 divisors (see below), whose sum is σ = 1363132800. Its totient is φ = 249054400.

The previous prime is 689543689. The next prime is 689543711. The reversal of 689543690 is 96345986.

It is a super-2 number, since 2×689543690² = 950941000837632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4646 + ... + 37425.

It is an arithmetic number, because the mean of its divisors is an integer number (42597900).

Almost surely, 2^689543690 is an apocalyptic number.

689543690 is a deficient number, since it is larger than the sum of its proper divisors (673589110).

689543690 is a wasteful number, since it uses less digits than its factorization.

689543690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42238.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 689543690 is about 26259.1639242380. The cubic root of 689543690 is about 883.4607565873.

The spelling of 689543690 in words is "six hundred eighty-nine million, five hundred forty-three thousand, six hundred ninety".