1681472927 has 4 divisors (see below), whose sum is σ = 1686777576. Its totient is φ = 1676168280.

The previous prime is 1681472917. The next prime is 1681472929. The reversal of 1681472927 is 7292741861.

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

It is a cyclic number.

It is not a de Polignac number, because 1681472927 - 2⁴ = 1681472911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681472929) 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, 2651849 + ... + 2652482.

It is an arithmetic number, because the mean of its divisors is an integer number (421694394).

Almost surely, 2^1681472927 is an apocalyptic number.

1681472927 is a deficient number, since it is larger than the sum of its proper divisors (5304649).

1681472927 is an equidigital number, since it uses as much as digits as its factorization.

1681472927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304648.

The product of its digits is 338688, while the sum is 47.

The square root of 1681472927 is about 41005.7669968506. The cubic root of 1681472927 is about 1189.1317082415.

The spelling of 1681472927 in words is "one billion, six hundred eighty-one million, four hundred seventy-two thousand, nine hundred twenty-seven".