1676991247 has 4 divisors (see below), whose sum is σ = 1680864640. Its totient is φ = 1673117856.

The previous prime is 1676991229. The next prime is 1676991287. The reversal of 1676991247 is 7421996761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7421996761 = 22157 ⋅334973.

It is a cyclic number.

It is not a de Polignac number, because 1676991247 - 2¹¹ = 1676989199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1676991194 and 1676991203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1676991287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936047 + ... + 1936912.

It is an arithmetic number, because the mean of its divisors is an integer number (420216160).

Almost surely, 2^1676991247 is an apocalyptic number.

1676991247 is a deficient number, since it is larger than the sum of its proper divisors (3873393).

1676991247 is an equidigital number, since it uses as much as digits as its factorization.

1676991247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873392.

The product of its digits is 1143072, while the sum is 52.

The square root of 1676991247 is about 40951.0835876171. The cubic root of 1676991247 is about 1188.0742921472.

The spelling of 1676991247 in words is "one billion, six hundred seventy-six million, nine hundred ninety-one thousand, two hundred forty-seven".