698961654 has 48 divisors (see below), whose sum is σ = 1571216400. Its totient is φ = 224296128.

The previous prime is 698961643. The next prime is 698961661. The reversal of 698961654 is 456169896.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 698961654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196072 + ... + 199604.

It is an arithmetic number, because the mean of its divisors is an integer number (32733675).

Almost surely, 2^698961654 is an apocalyptic number.

698961654 is the 14132-nd nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698961654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785608200).

698961654 is an abundant number, since it is smaller than the sum of its proper divisors (872254746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698961654 is a wasteful number, since it uses less digits than its factorization.

698961654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949 (or 3946 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 698961654 is about 26437.8829333969. The cubic root of 698961654 is about 887.4647599312.

The spelling of 698961654 in words is "six hundred ninety-eight million, nine hundred sixty-one thousand, six hundred fifty-four".