1676020861 has 4 divisors (see below), whose sum is σ = 1678564800. Its totient is φ = 1673476924.

The previous prime is 1676020831. The next prime is 1676020877. The reversal of 1676020861 is 1680206761.

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: 1680206761 = 103 ⋅16312687.

It is a cyclic number.

It is not a de Polignac number, because 1676020861 - 2¹³ = 1676012669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1676020861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1676020831) by changing a digit.

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, 1270981 + ... + 1272298.

It is an arithmetic number, because the mean of its divisors is an integer number (419641200).

Almost surely, 2^1676020861 is an apocalyptic number.

It is an amenable number.

1676020861 is a deficient number, since it is larger than the sum of its proper divisors (2543939).

1676020861 is an equidigital number, since it uses as much as digits as its factorization.

1676020861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543938.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1676020861 is about 40939.2337617596. The cubic root of 1676020861 is about 1187.8450893799.

The spelling of 1676020861 in words is "one billion, six hundred seventy-six million, twenty thousand, eight hundred sixty-one".