749713421 has 2 divisors, whose sum is σ = 749713422. Its totient is φ = 749713420.

The previous prime is 749713417. The next prime is 749713427. The reversal of 749713421 is 124317947.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548215396 + 201498025 = 23414^2 + 14195^2 .

It is a cyclic number.

It is not a de Polignac number, because 749713421 - 2² = 749713417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749713427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374856710 + 374856711.

It is an arithmetic number, because the mean of its divisors is an integer number (374856711).

Almost surely, 2^749713421 is an apocalyptic number.

It is an amenable number.

749713421 is a deficient number, since it is larger than the sum of its proper divisors (1).

749713421 is an equidigital number, since it uses as much as digits as its factorization.

749713421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 749713421 is about 27380.8951825904. The cubic root of 749713421 is about 908.4445597620. Note that the first 3 decimals are identical.

The spelling of 749713421 in words is "seven hundred forty-nine million, seven hundred thirteen thousand, four hundred twenty-one".