1933495681 has 4 divisors (see below), whose sum is σ = 2082226132. Its totient is φ = 1784765232.

The previous prime is 1933495649. The next prime is 1933495693. The reversal of 1933495681 is 1865943391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 490179600 + 1443316081 = 22140^2 + 37991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1933495681 - 2⁵ = 1933495649 is a prime.

It is a super-2 number, since 2×1933495681² = 7476811096891307522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1933495481) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 74365206 + ... + 74365231.

It is an arithmetic number, because the mean of its divisors is an integer number (520556533).

Almost surely, 2^1933495681 is an apocalyptic number.

It is an amenable number.

1933495681 is a deficient number, since it is larger than the sum of its proper divisors (148730451).

1933495681 is a wasteful number, since it uses less digits than its factorization.

1933495681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148730450.

The product of its digits is 699840, while the sum is 49.

The square root of 1933495681 is about 43971.5326205489. The cubic root of 1933495681 is about 1245.7983043744.

The spelling of 1933495681 in words is "one billion, nine hundred thirty-three million, four hundred ninety-five thousand, six hundred eighty-one".