1681877474 has 8 divisors (see below), whose sum is σ = 2523113388. Its totient is φ = 840839680.

The previous prime is 1681877459. The next prime is 1681877489. The reversal of 1681877474 is 4747781861.

It is an interprime number because it is at equal distance from previous prime (1681877459) and next prime (1681877489).

It can be written as a sum of positive squares in 2 ways, for example, as 1642275625 + 39601849 = 40525^2 + 6293^2 .

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

It is an unprimeable number.

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, 26087 + ... + 63594.

Almost surely, 2^1681877474 is an apocalyptic number.

1681877474 is a deficient number, since it is larger than the sum of its proper divisors (841235914).

1681877474 is an equidigital number, since it uses as much as digits as its factorization.

1681877474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99060.

The product of its digits is 2107392, while the sum is 53.

The square root of 1681877474 is about 41010.6995063483. The cubic root of 1681877474 is about 1189.2270653306.

The spelling of 1681877474 in words is "one billion, six hundred eighty-one million, eight hundred seventy-seven thousand, four hundred seventy-four".