1698998961 has 32 divisors (see below), whose sum is σ = 2509258752. Its totient is φ = 1013952960.

The previous prime is 1698998897. The next prime is 1698999011.

1698998961 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1698998961 - 2⁶ = 1698998897 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1698998892 and 1698998901.

It is not an unprimeable number, because it can be changed into a prime (1698998461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020816 + ... + 1022478.

It is an arithmetic number, because the mean of its divisors is an integer number (78414336).

Almost surely, 2^1698998961 is an apocalyptic number.

1698998961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1698998961 is a deficient number, since it is larger than the sum of its proper divisors (810259791).

1698998961 is a wasteful number, since it uses less digits than its factorization.

1698998961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133.

The product of its digits is 15116544, while the sum is 66.

The square root of 1698998961 is about 41218.9150876148. The cubic root of 1698998961 is about 1193.2488864762.

The spelling of 1698998961 in words is "one billion, six hundred ninety-eight million, nine hundred ninety-eight thousand, nine hundred sixty-one".