1698890725 has 12 divisors (see below), whose sum is σ = 2407571104. Its totient is φ = 1164953520.

The previous prime is 1698890707. The next prime is 1698890747. The reversal of 1698890725 is 5270988961.

It is not a de Polignac number, because 1698890725 - 2²¹ = 1696793573 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4853799 + ... + 4854148.

Almost surely, 2^1698890725 is an apocalyptic number.

It is an amenable number.

1698890725 is a deficient number, since it is larger than the sum of its proper divisors (708680379).

1698890725 is an equidigital number, since it uses as much as digits as its factorization.

1698890725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9707964 (or 9707959 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 1698890725 is about 41217.6021257909. The cubic root of 1698890725 is about 1193.2235470004.

The spelling of 1698890725 in words is "one billion, six hundred ninety-eight million, eight hundred ninety thousand, seven hundred twenty-five".