1930681 has 4 divisors (see below), whose sum is σ = 1955200. Its totient is φ = 1906164.

The previous prime is 1930679. The next prime is 1930693. The reversal of 1930681 is 1860391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1860391 = 13 ⋅143107.

It is a cyclic number.

It is not a de Polignac number, because 1930681 - 2¹ = 1930679 is a prime.

It is a super-2 number, since 2×1930681² = 7455058247522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1930081) 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, 12141 + ... + 12298.

It is an arithmetic number, because the mean of its divisors is an integer number (488800).

2^1930681 is an apocalyptic number.

It is an amenable number.

1930681 is a deficient number, since it is larger than the sum of its proper divisors (24519).

1930681 is an equidigital number, since it uses as much as digits as its factorization.

1930681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24518.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1930681 is about 1389.4894745913. The cubic root of 1930681 is about 124.5193488312.

The spelling of 1930681 in words is "one million, nine hundred thirty thousand, six hundred eighty-one".