1680151393 has 4 divisors (see below), whose sum is σ = 1682947588. Its totient is φ = 1677355200.

The previous prime is 1680151391. The next prime is 1680151489. The reversal of 1680151393 is 3931510861.

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 1609052769 + 71098624 = 40113^2 + 8432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680151393 - 2¹ = 1680151391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680151391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397196 + ... + 1398397.

It is an arithmetic number, because the mean of its divisors is an integer number (420736897).

Almost surely, 2^1680151393 is an apocalyptic number.

It is an amenable number.

1680151393 is a deficient number, since it is larger than the sum of its proper divisors (2796195).

1680151393 is an equidigital number, since it uses as much as digits as its factorization.

1680151393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796194.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1680151393 is about 40989.6498277309. The cubic root of 1680151393 is about 1188.8200985347.

The spelling of 1680151393 in words is "one billion, six hundred eighty million, one hundred fifty-one thousand, three hundred ninety-three".