161398698 has 16 divisors (see below), whose sum is σ = 325760160. Its totient is φ = 53305776.

The previous prime is 161398687. The next prime is 161398709. The reversal of 161398698 is 896893161.

It is an interprime number because it is at equal distance from previous prime (161398687) and next prime (161398709).

It is a self number, because there is not a number n which added to its sum of digits gives 161398698.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122740 + ... + 124047.

It is an arithmetic number, because the mean of its divisors is an integer number (20360010).

Almost surely, 2^161398698 is an apocalyptic number.

161398698 is an abundant number, since it is smaller than the sum of its proper divisors (164361462).

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

161398698 is a wasteful number, since it uses less digits than its factorization.

161398698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246901.

The product of its digits is 559872, while the sum is 51.

The square root of 161398698 is about 12704.2787280506. The cubic root of 161398698 is about 544.4608735876.

The spelling of 161398698 in words is "one hundred sixty-one million, three hundred ninety-eight thousand, six hundred ninety-eight".