747108421 has 2 divisors, whose sum is σ = 747108422. Its totient is φ = 747108420.

The previous prime is 747108389. The next prime is 747108433. The reversal of 747108421 is 124801747.

747108421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714492900 + 32615521 = 26730^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 747108421 - 2⁵ = 747108389 is a prime.

It is a super-2 number, since 2×747108421² = 1116341985458226482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747108821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373554210 + 373554211.

It is an arithmetic number, because the mean of its divisors is an integer number (373554211).

Almost surely, 2^747108421 is an apocalyptic number.

It is an amenable number.

747108421 is a deficient number, since it is larger than the sum of its proper divisors (1).

747108421 is an equidigital number, since it uses as much as digits as its factorization.

747108421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 747108421 is about 27333.2841239394. The cubic root of 747108421 is about 907.3911597822.

The spelling of 747108421 in words is "seven hundred forty-seven million, one hundred eight thousand, four hundred twenty-one".