747067921 has 2 divisors, whose sum is σ = 747067922. Its totient is φ = 747067920.

The previous prime is 747067891. The next prime is 747067933. The reversal of 747067921 is 129760747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603930625 + 143137296 = 24575^2 + 11964^2 .

It is a cyclic number.

It is not a de Polignac number, because 747067921 - 2¹¹ = 747065873 is a prime.

It is a super-2 number, since 2×747067921² = 1116220957174524482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (747067421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373533960 + 373533961.

It is an arithmetic number, because the mean of its divisors is an integer number (373533961).

Almost surely, 2^747067921 is an apocalyptic number.

It is an amenable number.

747067921 is a deficient number, since it is larger than the sum of its proper divisors (1).

747067921 is an equidigital number, since it uses as much as digits as its factorization.

747067921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 747067921 is about 27332.5432589066. The cubic root of 747067921 is about 907.3747632302.

The spelling of 747067921 in words is "seven hundred forty-seven million, sixty-seven thousand, nine hundred twenty-one".