690061250 has 30 divisors (see below), whose sum is σ = 1295193999. Its totient is φ = 275653000.

The previous prime is 690061243. The next prime is 690061261. The reversal of 690061250 is 52160096.

690061250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 159542161 + 530519089 = 12631^2 + 23033^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18575.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 928379 + ... + 929121.

Almost surely, 2^690061250 is an apocalyptic number.

690061250 is a deficient number, since it is larger than the sum of its proper divisors (605132749).

690061250 is an frugal number, since it uses more digits than its factorization.

690061250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 690061250 is about 26269.0169210802. The cubic root of 690061250 is about 883.6817382808.

The spelling of 690061250 in words is "six hundred ninety million, sixty-one thousand, two hundred fifty".