1678349733 has 16 divisors (see below), whose sum is σ = 2248521792. Its totient is φ = 1113552000.

The previous prime is 1678349731. The next prime is 1678349737. The reversal of 1678349733 is 3379438761.

It is not a de Polignac number, because 1678349733 - 2¹ = 1678349731 is a prime.

It is a super-2 number, since 2×1678349733² = 5633715652522342578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678349731) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 754563 + ... + 756783.

It is an arithmetic number, because the mean of its divisors is an integer number (140532612).

Almost surely, 2^1678349733 is an apocalyptic number.

It is an amenable number.

1678349733 is a deficient number, since it is larger than the sum of its proper divisors (570172059).

1678349733 is a wasteful number, since it uses less digits than its factorization.

1678349733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316.

The product of its digits is 2286144, while the sum is 51.

The square root of 1678349733 is about 40967.6669216103. Note that the first 3 decimals coincide. The cubic root of 1678349733 is about 1188.3950146867.

The spelling of 1678349733 in words is "one billion, six hundred seventy-eight million, three hundred forty-nine thousand, seven hundred thirty-three".