750743918921 has 2 divisors, whose sum is σ = 750743918922. Its totient is φ = 750743918920.

The previous prime is 750743918891. The next prime is 750743918971. The reversal of 750743918921 is 129819347057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724772984896 + 25970934025 = 851336^2 + 161155^2 .

It is an emirp because it is prime and its reverse (129819347057) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 750743918921 - 2¹⁰ = 750743917897 is a prime.

It is a super-2 number, since 2×750743918921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (750743918971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 375371959460 + 375371959461.

It is an arithmetic number, because the mean of its divisors is an integer number (375371959461).

Almost surely, 2^750743918921 is an apocalyptic number.

It is an amenable number.

750743918921 is a deficient number, since it is larger than the sum of its proper divisors (1).

750743918921 is an equidigital number, since it uses as much as digits as its factorization.

750743918921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 750743918921 in words is "seven hundred fifty billion, seven hundred forty-three million, nine hundred eighteen thousand, nine hundred twenty-one".