1681352194 has 8 divisors (see below), whose sum is σ = 2534702400. Its totient is φ = 836451396.

The previous prime is 1681352137. The next prime is 1681352209. The reversal of 1681352194 is 4912531861.

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

It is a super-2 number, since 2×1681352194² = 5653890400537227272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111854 + ... + 2112649.

It is an arithmetic number, because the mean of its divisors is an integer number (316837800).

Almost surely, 2^1681352194 is an apocalyptic number.

1681352194 is a deficient number, since it is larger than the sum of its proper divisors (853350206).

1681352194 is a wasteful number, since it uses less digits than its factorization.

1681352194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224704.

The product of its digits is 51840, while the sum is 40.

The square root of 1681352194 is about 41004.2948238352. The cubic root of 1681352194 is about 1189.1032469101.

The spelling of 1681352194 in words is "one billion, six hundred eighty-one million, three hundred fifty-two thousand, one hundred ninety-four".