1698725361 has 4 divisors (see below), whose sum is σ = 2264967152. Its totient is φ = 1132483572.

The previous prime is 1698725351. The next prime is 1698725429. The reversal of 1698725361 is 1635278961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1698725361 - 2⁶ = 1698725297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1698725361.

It is not an unprimeable number, because it can be changed into a prime (1698725311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283120891 + ... + 283120896.

It is an arithmetic number, because the mean of its divisors is an integer number (566241788).

Almost surely, 2^1698725361 is an apocalyptic number.

It is an amenable number.

1698725361 is a deficient number, since it is larger than the sum of its proper divisors (566241791).

1698725361 is an equidigital number, since it uses as much as digits as its factorization.

1698725361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566241790.

The product of its digits is 544320, while the sum is 48.

The square root of 1698725361 is about 41215.5960893446. The cubic root of 1698725361 is about 1193.1848310277.

The spelling of 1698725361 in words is "one billion, six hundred ninety-eight million, seven hundred twenty-five thousand, three hundred sixty-one".