1968751 has 2 divisors, whose sum is σ = 1968752. Its totient is φ = 1968750.

The previous prime is 1968749. The next prime is 1968767. The reversal of 1968751 is 1578691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968751 - 2¹ = 1968749 is a prime.

Together with 1968749, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1968751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984375 + 984376.

It is an arithmetic number, because the mean of its divisors is an integer number (984376).

2^1968751 is an apocalyptic number.

1968751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968751 is an equidigital number, since it uses as much as digits as its factorization.

1968751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The square root of 1968751 is about 1403.1218763885. The cubic root of 1968751 is about 125.3324695944.

The spelling of 1968751 in words is "one million, nine hundred sixty-eight thousand, seven hundred fifty-one".