1690000725 has 48 divisors (see below), whose sum is σ = 3200192000. Its totient is φ = 770904000.

The previous prime is 1690000687. The next prime is 1690000727. The reversal of 1690000725 is 5270000961.

It is not a de Polignac number, because 1690000725 - 2²⁸ = 1421565269 is a prime.

It is a super-2 number, since 2×1690000725² = 5712204901001051250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1690000692 and 1690000701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690000727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 258750 + ... + 265200.

Almost surely, 2^1690000725 is an apocalyptic number.

1690000725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1690000725 is a deficient number, since it is larger than the sum of its proper divisors (1510191275).

1690000725 is a wasteful number, since it uses less digits than its factorization.

1690000725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970 (or 6965 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1690000725 is about 41109.6184000776. The cubic root of 1690000725 is about 1191.1385955269.

The spelling of 1690000725 in words is "one billion, six hundred ninety million, seven hundred twenty-five", and thus it is an aban number.