1961398 has 8 divisors (see below), whose sum is σ = 2948400. Its totient is φ = 978600.

The previous prime is 1961381. The next prime is 1961411. The reversal of 1961398 is 8931691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1961398³ = 22636977495083330376, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

2^1961398 is an apocalyptic number.

1961398 is a deficient number, since it is larger than the sum of its proper divisors (987002).

1961398 is a wasteful number, since it uses less digits than its factorization.

1961398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102.

The product of its digits is 11664, while the sum is 37.

The square root of 1961398 is about 1400.4991967152. The cubic root of 1961398 is about 125.1762420598.

The spelling of 1961398 in words is "one million, nine hundred sixty-one thousand, three hundred ninety-eight".