698216481 has 12 divisors (see below), whose sum is σ = 1019867940. Its totient is φ = 460247040.

The previous prime is 698216473. The next prime is 698216539. The reversal of 698216481 is 184612896.

It can be written as a sum of positive squares in 2 ways, for example, as 387893025 + 310323456 = 19695^2 + 17616^2 .

It is not a de Polignac number, because 698216481 - 2³ = 698216473 is a prime.

It is a super-2 number, since 2×698216481² = 975012508680046722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (698216411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435040 + ... + 436641.

It is an arithmetic number, because the mean of its divisors is an integer number (84988995).

Almost surely, 2^698216481 is an apocalyptic number.

It is an amenable number.

698216481 is a deficient number, since it is larger than the sum of its proper divisors (321651459).

698216481 is a wasteful number, since it uses less digits than its factorization.

698216481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871776 (or 871773 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 698216481 is about 26423.7862729776. The cubic root of 698216481 is about 887.1492681702.

The spelling of 698216481 in words is "six hundred ninety-eight million, two hundred sixteen thousand, four hundred eighty-one".